I don't really know what would classify as midrange but my setup
with 3.4 GHz Athlon II BE and 8 GB RAM, SSD together with a
crossfirex setup, HD6870, don't run well.
I have set almost everything on medium or low except some kept
at high and the FPS drops to 10 or 20 over cities.
So I'm eagerly awaiting the patch becasue a new GPU isn't on the
horizon for me