Mark,

There was a lengthy discussion about this here on RCU a while ago, but I don't recall which thread it was in so some serious searching may be required.

According to the info in that thread, several guys proved that the behavior was exactly as you indicate, and that multiple systems could operate side-by-side on the same channel, due to each having slightly different frequency.

Naturally, this is not something that should encourage 5 guys to go out intentionally flying together on the same channel at the same time, but the behaviour is at least comforting in letting you know that you are a bit less likely to be shot down by someone else on your channel, than if you were using a more widely tuned system.

Gordon