A) Fat man looks strangely like Michael Moore.
B) I dunno that anybody wrote him a nice check or not, but I think he saw the huge revenues they were missing out on, and at least where I live there has been a massive migration from 360 to PS3. Friends have literally waited months just to get a ps3, bc they're sold out everywhere around here. Which means fat man isn't getting the money he thinks he deserves and therefore can't keep feeding himself masses of doughnuts. Fact remains that PS3 is a nearly untapped revenue stream for Valve.
C) They may have started to agree with EA on how tapped out the 360 is? I say that as a 360, ps3, pc, mac, and wii owner. EA has said in the past the 360 is tapped, Valve may be looking for a new platform to develop for that has some processing potential left.
D) Is this the same dude that spent time bashing how ridiculous the ps3 was to program for? I'm not really sure if they just couldn't recruit ps3 programmers or what, but I'm not sure I trust this fat man.