wine users - Feb 2012 - Low FPS Skyrim with 560 Ti... Expecting too much?

Hey guys.  I just got Skyrim running in Arch Linux with wine 1.4RC3, and my
framerate seems pretty low.  I'm using an Evga GTX 560 Ti 448 core
classified, an i5 2500k OC'd at 4.5ghz, and 16gb ddr3 at 1600.  The 560 ti
is running the latest Nvidia beta drivers.  The average framerate is around 30
fps on ultra.  Is that about what I should expect from that hardware, or is this
a wine thing?  I know that I shouldn't expect the same performance as
Windows, but this seems a bit low to me.  I followed the instructions on the
Skyrim entry in the appdb, so I don' t think there's a setting that
I'm missing to improve performance.  Any thoughts, suggestions?