There is a small performance growth in Crysis Warhead, too, but not in every mode.
Far Cry 2
The new Catalyst 8.12 driver delivers an 8 to 11% performance growth in Far Cry 2, and I did not see that the image quality got any worse with it in the benchmark or in the game (I checked this out on three levels of the game). At the same time, there were occasional slowdowns in the benchmark with every version of the driver. Such slowdowns are less frequent, but still uncomfortable, during actual play.
X3: Terran Conflict