I did a quick comparison to my 8800GT today with this:
DX10 1024x768 No AA/AF All Very High Settings
AVG FPS = 60FPS
Once I changed the res to 1366x768, it dropped down to about 30FPS on average. But I did not play through the entire demo. My card is having some heat issues so I'm trying to get them taken care of first.
EDIT - I'm sofa king we todd ed.