As nice a machine as it is, a lot of developers are struggling when it comes to porting games to the PS3. If it's a 360 game, or if the 360's the lead platform, hoo-boy, we've got problems. Midway have certainly had problems, something they're at least big enough to admit:
For our first wave of next-gen games... lead development has been on the Xbox 360, due to its earlier introduction and larger installed base. We ran into some technical issues developing for the PlayStation 3 that have taken more time to finalize than we expected.
These include... making sure that the framerate, networking, and graphical features are at parity between the platforms. We've also encountered challenges as a result of shipping two of the very first PS3 games using Epic's Unreal Engine 3.