It would appear that the medium quality settings are too much of a drop in image quality as even the GeForce 9600 GSO is capable of reaching 88fps.
It was interesting to see that the Radeon HD 4670 and 4650 did not really improve, while the GeForce 9500 GT looked like it meant business for the first time after rendering less than 5 frames per second on some of the previous tests.
Increasing the resolution helped get the Radeon HD 4670 and 4650 graphics cards back in the game as the GeForce 9500 GT fell from 63fps at 1440x900, to just 48fps at 1680x1050. The rest of the pack should have no problem handling the game at all.
The performance trend seen at 1680x1050 was repeated here. The Radeon HD 3850 was capable of very highly playable performance with an average of 75fps, while the slowest graphics card tested was again the GeForce 9500 GT with just 40fps.