250w is still the power it requires, which is what his argument is. 300w is not 'unacceptable' if that's what it would take. HBM2 is certainly not going to reduce draw by 50w, anyways.
Honestly, it's drunkenmaster here. If this was AMD, he'd be saying the same things I am. He merely adjusts his arguments based on what suits his agenda best. It's actually funny because if he actually believes what he's saying, he should be very worried about what AMD can do to even compete given they are behind in efficiency compared to Pascal. I know Vega is supposed to bring further improvements and HBM2 should help, but that will more than likely just bring them closer in line to what Nvidia has to deal with, not leapfrog them. Unless Vega is some huge hit and Polaris is just some poor stopgap.