Great job guys, awesome benchmark review to wake up to!
At 1680x1050 I still think we are seeing a GPU limitation, if you look the E8400 gets the same score as the super fast 4ghz QX9770, with only .6 fps difference which is nothing.
The Q6600 is around 2fps slower than the E8400, again a very small amount which does show that there could be a benefit from the extra 2 cores... as its 600mhz slower, but at the same time this 2 fps diff could be the 600mhz slower clock?
I think it would be good if you could OC the Q6600 to 3ghz and then do a E8400 vs Q6600@3Ghz test, we would see a good cpu comparison (although not perfect as penryn has better architecture etc.)
And lastly would be good to see the CPU test with GTX260 in SLI, that would really stress the CPU's a lot more and would further show the diff between mhz and more cores!

Good to see the game runs fast even on medium range GPU's ! My 8800GTX should play this "ok"

good retirement torture for it :P
One or two mistakes i picked up, on the high end GPU tests the last chart is showing 1680x1050, not 1920x.....
The vegetation in that SS reminds me a bit of Stalker CS, same kind of art style :P
Again an awesome review, thank you!
Yapa
PS: would also be good to see task manager CPU usage in Dual and Quad core