No need to be sarcastic. I find it interesting that somebody goes through the trouble of creating a new user account, just to confirm a theory that nobody could confirm without getting in trouble.

It doesn't prove anything, but it certainly fits the context. I would say the theory (and the extra bit of information) merit being analyzed further.

FWIW, a "stub copy of iOS" would mean in this context "a copy of iOS where every OS function is stubbed except what's necessary to run AirPlay."