Sensitivity to non-speech input

I'll be on to Voxeo soon, but if anyone has done some testing on sensitivity to non-speech input, I'd be interested.

I'm using a close-talk mike, and I'm finding that <record> elements latch onto breathing; so even if I'm silent, the system picks that up as my response.

I'm also still fairly certain the timeout timers do start early, before the end of the announcements even if bargein is set to false, but I need more testing to be certain.