I just fired up the game and it gives you the option to run using either Dx 9 or 11. When I ran it in 11, the game was slow as molasses, but with 9 I'm getting close to 60 fps most of the time and this is with everything running on high settings at 1600x900. I was a little worried for a second there when I first loaded it using the recommended Dx 11 and the performance was so bad, but Dx 9 is running great.
But I'm curious why Dx 11 would be so slow...anybody have any ideas? I have Dx 11 on my machine so I would like to use it if possible although the only difference between the 2 that I see in the settings is that there's no anti-aliasing using Dx9.