I tested it in the strip as well as on top of a mountain with all graphics options maxed out and it seems I no longer need the hot fix to run the game. Woot!

270 here fixes the low fps.. but getting stuttering now

Bout a half hour in now, and the patch has improved most of my previous performance issues. I read several posts last week suggesting the 200series runs best with the 186 driver, which I thought improved little but after patch I reverted to 260.99 and its running as smooth as ever for me, however there is some intermittent stuttering but very infrequently. I'm running on high setting with 4x AA & 8X AS.

Windows 7 64-bit
Geforce gtx 280
8GB DDR2 RAM
core2duo e8500 @ 3.16ghz