Jen should have done this. He is far better than any guy i have seen in a gpu conference. Loads of people really believed the 2 x perf. Seriously though the man is good at what he does.
Not really and loads of people (well a couple here that I know of) are taking what Jen Hsun said out of context and he was saying 2 x the performance in VR. Not that it really matters though, as like I said earlier, people will look to whatever they can to make something look bad when they either A) - can't afford it, B) - No interest and just want to make something look bad for self pleasure or C) - Being really thick and not understanding it.