[BuckRogers]

>They focus on one platform, because game programming is more than the graphics API, the hardware architecture and OS are also part of the whole equation, and what means being able to extract every single byte and ms for a few extra FPS.

^ That is how I know you're BSing. I can assure you, while reading between the lines you seem to be very concerned with promoting Microsoft.. if you think game devs are extracting "every single byte and ms for a few FPS".. given the buggy, unoptimized nature of many games, you are quite the comedian.