Even their explanation is inconsistent:
"The game is so huge in terms of rendering that it took months to get it to 720p at 30fps. The game was 9fps 9 months ago. We only achieved 900p at 30fps weeks ago."
If you had trouble moving from 720P to 900P until recently and you discuss how large the game is due to rendering, you are basically GPU limited. Yet he says that on PS4, they could only achieve 1-2 fps more due to a 50% powerful GPU later in the interview. How does that even work? You have 32 ROPs vs. 16 ROPs on XBox and 50% more shading power and 176GB/sec memory bandwidth and you got 1-2 fps increase at the same graphics? Alternatively why didn't they use the excess GPU power to increase textures, details, shadow detail? I mean it's just sitting there. And I mean basically they admitted to doing pre-baked lighting on the CPU instead of using DirectCompute for dynamic global illumination on the GPU. That's mind-boggling considering how much faster the GPU is for lighting and considering they are stating how the lighting used up 50% of the PS4's CPU power. So why in the world would you underutilize your excess GPU power in PS4 for lighting and overburden the CPU? It's literally admitting indirectly that they made the game for Xbox One and did nothing with PS4's extra GPU power.
Secondly, if your game ran at 9 fps 9 months ago on HD7850 hardware and barely got 30 fps at 900p "weeks ago", how broken is the game engine? Holly cow. If they managed 30 fps on 1.6Ghz Jaguar, we should expect like 100 fps+ on a Core i7 4790K without a GPU limitation. Did they not even play Infamous Second Son before they made claims of a "next generation experience"?