It just dawned on me - of course Sony would have a bigger dev team size than Nintendo. What justifies the larger budget cost for an HD game over a Wii game? Graphics, of course. HD development has a heavy budget toll in the art department. You will have to hire 4-5 times as many people on your HD art team to make the same deadlines as the SD devs.
As for MS, it could just be that they don't really have much of a 1st party team these days, just a few 2nd parties they bought outright.







