The only thing that pisses me off with that video is the "second bloke".
"Yeah, it seems really smooth compared to the 4S" ... as if the 4S has suddenly become this juddering, stuttering, slow phone. Honestly, stop drinking the damn Kool Aid. Yes, you can see it's faster, but the 4S is still a very, very smooth iOS device, even on iOS 6.
Hell, the iPhone 4 is still smooth and fluid. That guy wasn't drinking the Kool-Aid, he was swimming in it.