diff --git a/asset/arena/quantus-arena-exporter.py b/asset/arena/quantus-arena-exporter.py
index 68e2301..aab953d 100755
--- a/asset/arena/quantus-arena-exporter.py
+++ b/asset/arena/quantus-arena-exporter.py
@@ -415,7 +415,13 @@ class Arena:
         # Last tip block recorded: (height, author timestamp ms, preimage). Feeds
         # the per-author gap, drift and consecutive-block series below.
         self.last_tip = None
-        self.gap_hist = {}        # preimage -> Hist(GAP_BUCKETS)
+        self.gap_hist = {}        # preimage -> Hist(GAP_BUCKETS), by author timestamps
+        # Same, by the moment this exporter saw each block. Author timestamps
+        # are set when the node BUILDS the proposal (right after the previous
+        # block arrives), so they measure proposal timing; withheld blocks show
+        # in arrival timing. Resolution is the poll interval until telemetry
+        # first-seen replaces it (lair/quantus#11).
+        self.arrival_hist = {}    # preimage -> Hist(GAP_BUCKETS)
         self.drift_hist = {}      # preimage -> Hist(DRIFT_BUCKETS)
         self.consecutive = {}     # preimage -> blocks authored directly after its own
         # Tip observations only — used for the block interval, which is real
@@ -471,10 +477,11 @@ class Arena:
             last = self.last_tip
             if last is not None and height == last[0] + 1:
                 self.gap_hist.setdefault(pre, Hist(GAP_BUCKETS)).observe((ts - last[1]) / 1000.0)
+                self.arrival_hist.setdefault(pre, Hist(GAP_BUCKETS)).observe(seen - last[3])
                 if last[2] == pre:
                     self.consecutive[pre] = self.consecutive.get(pre, 0) + 1
             self.drift_hist.setdefault(pre, Hist(DRIFT_BUCKETS)).observe(ts / 1000.0 - seen)
-            self.last_tip = (height, ts, pre)
+            self.last_tip = (height, ts, pre, seen)
 
     def poll_once(self):
         health = self.rpc.call("system_health", [])
@@ -626,6 +633,7 @@ class Arena:
         # is merged into preimage="other" and the whole network into "all".
         with self.lock:
             gaps = {k: v for k, v in self.gap_hist.items()}
+            arrivals = {k: v for k, v in self.arrival_hist.items()}
             drifts = {k: v for k, v in self.drift_hist.items()}
             consecutive = dict(self.consecutive)
 
@@ -647,10 +655,15 @@ class Arena:
             return shown
 
         if gaps:
-            out.append("# HELP quantus_block_gap_seconds Seconds between a block and the previous one, by the author of the later block (author timestamps). Bursts in the lowest buckets for one author right after others' blocks are withheld blocks.")
+            out.append("# HELP quantus_block_gap_seconds Seconds between a block's author timestamp and the previous block's, by the author of the later block. Author timestamps are set when the node builds the proposal, so this measures proposal timing; see quantus_block_arrival_gap_seconds for release timing.")
             out.append("# TYPE quantus_block_gap_seconds histogram")
             for labels, h in labelled(gaps):
                 h.render(out, "quantus_block_gap_seconds", labels)
+        if arrivals:
+            out.append("# HELP quantus_block_arrival_gap_seconds Seconds between this exporter first seeing a block and first seeing the previous one, by the author of the later block. Resolution is the poll interval. Withheld blocks arrive right after others'.")
+            out.append("# TYPE quantus_block_arrival_gap_seconds histogram")
+            for labels, h in labelled(arrivals):
+                h.render(out, "quantus_block_arrival_gap_seconds", labels)
         if drifts:
             out.append("# HELP quantus_block_timestamp_drift_seconds Block timestamp minus the time this exporter first saw the block, by author. Negative is propagation and poll lag; positive is a future-dated block.")
             out.append("# TYPE quantus_block_timestamp_drift_seconds histogram")
diff --git a/asset/grafana/quantus.json b/asset/grafana/quantus.json
index 64eef6c..ed99d0d 100644
--- a/asset/grafana/quantus.json
+++ b/asset/grafana/quantus.json
@@ -9,7 +9,7 @@
   ],
   "timezone": "browser",
   "schemaVersion": 39,
-  "version": 16,
+  "version": 18,
   "refresh": "30s",
   "time": {
     "from": "now-6h",
@@ -1716,7 +1716,7 @@
         "x": 0,
         "y": 62
       },
-      "description": "Blocks observed authored within the selected time range, by reward preimage (cumulative counter, exists from the exporter's restart onward). est. MH/s is the author's share of blocks times the network hashrate estimate over the range: a statistical figure, \u00b110% or so at a few hundred blocks. gap p10: the 10th percentile of seconds between the author's block and the previous one; near zero means blocks released right after others' (withheld). drift median: the author's block timestamp minus when we first saw it; a few seconds negative is normal, positive is future-dated. consecutive: blocks authored directly after the author's own previous block. Timing columns fill in from when the exporter started recording them. burst \u00d7: consecutive self-blocks divided by the count expected from the author's share (blocks \u00d7 share); about 1 is normal, sustained values above 2 mean blocks held and released together. Shown only where the expected count exceeds one. Cell colours: gap p10 red under 1 s and amber under 3 s; drift green in the normal negative band, amber once future-dated, red past 5 s, blue when more than 20 s in the past; burst amber above 2, red above 4.",
+      "description": "Blocks observed authored within the selected time range, by reward preimage (cumulative counter, exists from the exporter's restart onward). est. MH/s is the author's share of blocks times the network hashrate estimate over the range: a statistical figure, \u00b110% or so at a few hundred blocks. quick-follow \u00d7: the share of the author's blocks that arrived (as seen by the exporter, 1 s poll) within 2 s of the previous block, divided by the network's share; about 1 is normal, 2 or more means blocks released right after others' (withheld). Needs 10 samples. drift median: the author's block timestamp minus when we first saw it; a few seconds negative is normal, positive is future-dated. consecutive: blocks authored directly after the author's own previous block. Timing columns fill in from when the exporter started recording them. burst \u00d7: consecutive self-blocks divided by the count expected from the author's share (blocks \u00d7 share); about 1 is normal, sustained values above 2 mean blocks held and released together. Shown only where the expected count exceeds one. Cell colours: quick-follow amber above 2 and red above 3; drift green in the normal negative band, amber once future-dated, red past 5 s, blue when more than 20 s in the past; burst amber above 2, red above 4.",
       "targets": [
         {
           "datasource": {
@@ -1749,7 +1749,7 @@
           },
           "editorMode": "code",
           "refId": "C",
-          "expr": "(histogram_quantile(0.1, sum by (preimage, le) (increase(quantus_block_gap_seconds_bucket{preimage!~\"all|other\"}[$__range])))) == (histogram_quantile(0.1, sum by (preimage, le) (increase(quantus_block_gap_seconds_bucket{preimage!~\"all|other\"}[$__range]))))",
+          "expr": "((sum by (preimage) (increase(quantus_block_arrival_gap_seconds_bucket{le=\"2.0\",preimage!~\"all|other\"}[$__range])) / sum by (preimage) (increase(quantus_block_arrival_gap_seconds_count{preimage!~\"all|other\"}[$__range]))) / scalar(sum(increase(quantus_block_arrival_gap_seconds_bucket{le=\"2.0\",preimage=\"all\"}[$__range])) / sum(increase(quantus_block_arrival_gap_seconds_count{preimage=\"all\"}[$__range])))) and on(preimage) (sum by (preimage) (increase(quantus_block_arrival_gap_seconds_count{preimage!~\"all|other\"}[$__range])) >= 10)",
           "instant": true,
           "range": false,
           "format": "table"
@@ -1845,7 +1845,7 @@
               "self 1": "ours",
               "Value #A": "blocks",
               "Value #B": "est. MH/s",
-              "Value #C": "gap p10 (s)",
+              "Value #C": "quick-follow \u00d7",
               "Value #D": "drift median (s)",
               "Value #E": "consecutive",
               "Value #F": "burst \u00d7"
@@ -2012,7 +2012,23 @@
           {
             "matcher": {
               "id": "byName",
-              "options": "gap p10 (s)"
+              "options": "consecutive"
+            },
+            "properties": [
+              {
+                "id": "decimals",
+                "value": 0
+              },
+              {
+                "id": "unit",
+                "value": "none"
+              }
+            ]
+          },
+          {
+            "matcher": {
+              "id": "byName",
+              "options": "quick-follow \u00d7"
             },
             "properties": [
               {
@@ -2042,15 +2058,19 @@
                   "mode": "absolute",
                   "steps": [
                     {
-                      "color": "red",
+                      "color": "transparent",
                       "value": null
                     },
                     {
-                      "color": "orange",
-                      "value": 1
+                      "color": "green",
+                      "value": 0
                     },
                     {
-                      "color": "green",
+                      "color": "orange",
+                      "value": 2
+                    },
+                    {
+                      "color": "red",
                       "value": 3
                     }
                   ]
@@ -2091,9 +2111,13 @@
                   "mode": "absolute",
                   "steps": [
                     {
-                      "color": "blue",
+                      "color": "transparent",
                       "value": null
                     },
+                    {
+                      "color": "blue",
+                      "value": -1000000
+                    },
                     {
                       "color": "green",
                       "value": -20
@@ -2111,22 +2135,6 @@
               }
             ]
           },
-          {
-            "matcher": {
-              "id": "byName",
-              "options": "consecutive"
-            },
-            "properties": [
-              {
-                "id": "decimals",
-                "value": 0
-              },
-              {
-                "id": "unit",
-                "value": "none"
-              }
-            ]
-          },
           {
             "matcher": {
               "id": "byName",
@@ -2160,9 +2168,13 @@
                   "mode": "absolute",
                   "steps": [
                     {
-                      "color": "green",
+                      "color": "transparent",
                       "value": null
                     },
+                    {
+                      "color": "green",
+                      "value": 0
+                    },
                     {
                       "color": "orange",
                       "value": 2
@@ -3614,8 +3626,8 @@
     },
     {
       "type": "timeseries",
-      "title": "Shortest gaps by author (p10, 6h)",
-      "description": "10th percentile of the time between a block and the previous one, by the author of the later block. The network's gaps are exponential around the target; an author whose p10 sits near zero is releasing blocks right after other people's, which is what withheld blocks look like.",
+      "title": "Quick follows by author (share of blocks arriving within 2 s, 6h)",
+      "description": "Share of each author's blocks that arrived within 2 s of the previous block, by the exporter's observation time (1 s poll). The network's own share is the baseline; an author well above it is releasing blocks right after other people's, which is what withheld blocks look like.",
       "datasource": {
         "type": "prometheus",
         "uid": "prometheus"
@@ -3631,7 +3643,7 @@
           "color": {
             "mode": "palette-classic"
           },
-          "unit": "s",
+          "unit": "percentunit",
           "custom": {
             "lineWidth": 1,
             "fillOpacity": 0,
@@ -3656,7 +3668,7 @@
             "uid": "prometheus"
           },
           "editorMode": "code",
-          "expr": "histogram_quantile(0.10, sum by (preimage, le) (rate(quantus_block_gap_seconds_bucket{preimage!=\"other\"}[6h])))",
+          "expr": "sum by (preimage) (increase(quantus_block_arrival_gap_seconds_bucket{le=\"2.0\",preimage!=\"other\"}[6h])) / sum by (preimage) (increase(quantus_block_arrival_gap_seconds_count{preimage!=\"other\"}[6h]))",
           "legendFormat": "{{preimage}}",
           "range": true,
           "refId": "A"
diff --git a/asset/systemd/quantus-arena.service b/asset/systemd/quantus-arena.service
index d9a2ae3..fcc26f4 100644
--- a/asset/systemd/quantus-arena.service
+++ b/asset/systemd/quantus-arena.service
@@ -31,6 +31,7 @@ EnvironmentFile=/etc/quantus-arena/arena.env
 WorkingDirectory=/var/lib/quantus-arena
 
 ExecStart=/usr/bin/python3 /usr/local/bin/quantus-arena-exporter.py \
+    --poll-seconds 1 \
     --rpc-url http://127.0.0.1:9944 \
     --port 25033 \
     --window-blocks 3600 \