I can, easily.
The new Nvidia driver 314.07 improved my performance.
And it seems my GTX670 is not magical :
http://physxinfo.com/news/9653/borderlands-2-physx-benchmark-roundup/
Even a GTX580 can run the game at 60fps with Physx high, I was already very close to that with my GTX570.
Same goes for Batman AA/AC and Alice Madness Returns. Haven't tried Hawken yet.
My 680 runs Borderlands 2 w/ PhysX like complete and utter trash. I get frequent dips to the 30's and 40's with low GPU utilization but high CPU utilization, like the game isn't using GPU for PhysX at all even when forced to. Both Batman games run great however
(Except for the Penguin fight with the Mr. Freeze gun, I drop to the 50's when there are a bunch of ice particles being rendered)