Terrible performance, poor Engine with no changes to the code and ridiculous A.I.
My system when testing:
Core i5-2500K, 8GB 1600Mhz DDR3, OCd 7870
= 17fps on High Settings, no AA.
Some people with very expensive Crossfire / SLI setups also complain of low frame rates.
Other than the Engine that destroys the game, the graphics look very good and the water looks amazing. Vehicles are fun to use, but some 4 wheelers cannot crawl up tiny slopes faster than 2mph.
Let's not forget A.I that can see your through bushes, smoke and over very long distances, with the precision to shoot the head from your soldiers with a single shot within an instant.
A lot of potential, but nothing short of a complete let down.