I don't see any performance drops, only except when in town, but I built a pretty decent computer ground up.

Also as a side note, I read a couple comments about PS3 and why it's not released etc... I'd bet everything the primary reason is marketing. The PS3 stands as a second launch for them. I have no doubt the game is being optimized and may or may not be fully ready on PS3 hardware, but the primary reason for delay is they want more fixes, more content, and more polish before "trying again"