I've genuinely not encountered this issue.
I've noticed iOS5 fixes a long running problem I had with a 3 year old bluetooth in car head unit.
Before, if the unit 'auto connected' the audio was 'scratchy' and lacking in bass. Disconnecting and reconnecting fixed it instantly, but it was annoying. This doesn't happen with iOS5 - on 4 or 4S, so at least for me, audio is much improved.
I've noticed iOS5 fixes a long running problem I had with a 3 year old bluetooth in car head unit.
Before, if the unit 'auto connected' the audio was 'scratchy' and lacking in bass. Disconnecting and reconnecting fixed it instantly, but it was annoying. This doesn't happen with iOS5 - on 4 or 4S, so at least for me, audio is much improved.