diff --git a/guides/learn/speech-input.mdx b/guides/learn/speech-input.mdx
index 35d72d0f..79ef39c1 100644
--- a/guides/learn/speech-input.mdx
+++ b/guides/learn/speech-input.mdx
@@ -76,6 +76,7 @@ In the vast number of cases, the default values will work well. Only adjust thes
 - How much silence must be detected before confirming speech has stopped
 - Critical for turn-taking behavior
 - A short value (0.2s) allows STT services to finalize sooner, improving transcription speed
+- **Important**: Built-in STT P99 latency values are measured with `stop_secs=0.2`. If you change this value, re-run the [stt-benchmark](https://github.com/pipecat-ai/stt-benchmark) with your settings and pass the measured latency to your STT service via `ttfs_p99_latency`
 
 **`confidence` and `min_volume`**
 
diff --git a/server/utilities/turn-management/user-turn-strategies.mdx b/server/utilities/turn-management/user-turn-strategies.mdx
index 44a250e8..48b27a09 100644
--- a/server/utilities/turn-management/user-turn-strategies.mdx
+++ b/server/utilities/turn-management/user-turn-strategies.mdx
@@ -228,6 +228,16 @@ from pipecat.turns.user_stop import SpeechTimeoutUserTurnStopStrategy
 strategy = SpeechTimeoutUserTurnStopStrategy(user_speech_timeout=0.6)
 ```
 
+<Note>
+  Built-in STT P99 latency values assume `VADParams.stop_secs=0.2` (the
+  recommended default). If you change `stop_secs`, the strategy will log a
+  warning suggesting you re-run the [stt-benchmark](https://github.com/pipecat-ai/stt-benchmark)
+  with your VAD settings and pass the measured TTFS P99 latency to your STT
+  service constructor via `ttfs_p99_latency`. The strategy will also warn if
+  `stop_secs >= STT p99 latency`, which collapses the STT wait timeout to 0s
+  and may cause delayed turn detection.
+</Note>
+
 ### TurnAnalyzerUserTurnStopStrategy
 
 Uses an AI-powered turn detection model to determine when the user has finished speaking. This provides more intelligent end-of-turn detection that can understand conversational context.
@@ -251,6 +261,16 @@ strategy = TurnAnalyzerUserTurnStopStrategy(
   more information on available turn analyzers.
 </Tip>
 
+<Note>
+  Built-in STT P99 latency values assume `VADParams.stop_secs=0.2` (the
+  recommended default). If you change `stop_secs`, the strategy will log a
+  warning suggesting you re-run the [stt-benchmark](https://github.com/pipecat-ai/stt-benchmark)
+  with your VAD settings and pass the measured TTFS P99 latency to your STT
+  service constructor via `ttfs_p99_latency`. The strategy will also warn if
+  `stop_secs >= STT p99 latency`, which collapses the STT wait timeout to 0s
+  and may cause delayed turn detection.
+</Note>
+
 ### ExternalUserTurnStopStrategy
 
 Delegates turn stop detection to an external processor. This strategy listens for `UserStoppedSpeakingFrame` frames emitted by other components in the pipeline.