I just updated to the new drivers, I went in and flew around first, had smoke on and fired bullets into the ground etc...
After the new drivers were installed, I did the same thing. I just didn't see much of a difference if any at all, but that is just me and my system specs.
This is with my normal graphic settings of medium, plus scenes on high, I have to have all those trees, and water on high.
38 FPS sitting on the runnway.....
I did howerver notice an improvment in FPS when setting my graphic settings to high, plus heat blur..... 32 FPS sitting on the runway, the lowest frames I got was when firing my gun, smoke on, and firing flares at the same time. It drop to 18-22 FPS. I never got a crash from using advanced haze.