Sure, OTH, and as I said, I have sympathy for those whose devices are bricked (through no fault of their own, eg power outage during an update? ... jailbreakers do so at their own risk IMO) and those whose devices exhibit the problems that the update is purported to address.
Incidentally, I am not sure about iOS versions, but my ATV with 4.1.1 airplays from my iPad etc. I seem to recall this feature came with 4.1. See here http://support.apple.com/kb/HT4448 .
I would hate you to be chasing the upgrade as the solution to your problem if it might actually be something else.
I do agree that it is well past time for Apple to post something ... but I also want world peace and any number of other things that i know I cannot have. Now, where's that herring sandwich ...?