Hmm... no offense, but this question is kind of pointless. Nobody here knows ANYTHING about the actual game programming, so you'll get this:
PS3 fans: "I'd say no more than 20%. While playing MGS, teh cell has to calculate Pi just to avoid falling asleep"
X360 fans: "130%. The PS3 can't handle it watch teh framerate crawl"
Wii fans: "Who cares it's about teh gameplay stoopid"
Currently playing: NSMB (Wii)