docs: reword vague sentences and fix wrong claims (#2760)

fluxer_docs/src/content/docs/http-api/experiments.mdx

@@ -6,7 +6,7 @@ description: The experiment assignments envelope, the revalidation and polling c
 
 import RouteHeader from '@/components/RouteHeader.astro';
 
-An experiment is one instance-wide rollout the operator configures and Fluxer resolves against one account. The single route on this page resolves every experiment the server defines and returns them in one envelope, together with the polling cadence they share. `voice_noise_suppression` is the only experiment defined today, and [Voice](/voice/) defines the placement protocol its assignment applies to.
+An experiment is an instance-wide rollout that an operator configures. For each account, Fluxer works out from that configuration whether the account is in the rollout and which settings the account receives. The single route on this page resolves every experiment the server defines and returns them in one envelope, together with the polling cadence they share. `voice_noise_suppression` is the only experiment defined today, and [Voice](/voice/) defines the placement protocol its assignment applies to.
 
 Every assignment is advice. A client that ignores one behaves as it does with the rollout off, and no route and no Gateway event reports what a client actually ran.
 
@@ -19,10 +19,10 @@ One resolution of every defined experiment against one account. Every field is p
 | Field | Type | Description |
 | --- | --- | --- |
 | poll_interval_seconds | integer | Seconds to wait before revalidating, from 60 through 86400 |
-| poll_jitter_percent | integer | How far to spread the wait around the interval, from 0 through 50 |
+| poll_jitter_percent | integer | The largest random offset added to or subtracted from the wait, as a percentage of the wait, from 0 through 50 |
 | assignments | [assignment map](#assignment-map-object) object | One entry for each experiment the server defines |
 
-The polling fields apply to every experiment and account on the instance.
+Every account on the instance receives the same `poll_interval_seconds` and `poll_jitter_percent`. One request refreshes every experiment.
 
 ## Assignment map object
 
@@ -36,7 +36,7 @@ One entry per experiment. The envelope reports this object even when it is empty
 
 Ignore unknown experiments and treat a missing experiment as off.
 
-This server version writes `voice_noise_suppression` on every response, including while the rollout is disabled. The disabled value is the first [resolution outcome](#resolution-outcomes) below, which reports `enabled` false and the stored `config_version`, so a client can tell an operator write from a no-op without a second request.
+This server version writes `voice_noise_suppression` on every response, including while the rollout is disabled. The disabled value is the first [resolution outcome](#resolution-outcomes) below, which reports `enabled` false and the stored `config_version`, so a client that compares `config_version` with the value from its previous response can see that an operator saved the noise suppression configuration, even while the rollout stays disabled, and needs no second request for it.
 
 ## Noise suppression backends
 
@@ -91,7 +91,7 @@ A client branches on `user_targeted` rather than on `enabled_backends`, because
 
 ## Noise suppression guild override object
 
-One backend replacement scoped to one guild. A guild named here replaces `backend` while the caller is connected to a voice channel of that guild.
+One backend replacement scoped to one guild. While the caller is connected to a voice channel of that guild, the override's `backend` replaces the assignment's `backend`.
 
 ### Structure