Naaa I think the 360 will do just fine. They chose to concentrate on the PS3 as it is the harder nut to crack and there is the new love btw EA and Sony, anyway I think the 360 will do just fine. They did say that they will be making a presentation about FB2 on 360 come SIGGRAPH 11 so I would expect to see 360 footage then or thereafter.
Dice seems to optimize to the strength of both platforms, the Xbox 360 version should do just fine.