Given the very strong similarities between the graphics technologies between PCs and these consoles (especially RSX), as well as experience in multi-threaded programming, as well as actually having ACCESS to develop on and test the hardware, i cant see how he's not VERY qualified to make the statements he did.
Now if youre talking about the overall console development lifecycle (from requirements to finished product) well yeah hes probably not as seasoned as some of the others but tahts not what we're discussing here. We're talking about his (simple, high level) evaluation and subsequent opinion of hardware and development tools. I see no reason why his opinion shouldnt be highly regarded.
I am happy to be proven wrong though, (and have!).