I'm using 306.23. I have some "flickering haze" when the sunlight hit the proppeler blades in some angles, like in this other video, but nothing that ruins my aim.
The performance is very good, because i recorder this "on the fly" with FRAPS, and the performance without recording is much better.
Im running 306.97, can't imagine that would affect what I see, it could though. I dialed back the cpu to four cores, turned off my OC on the cpu and ran drivers back to the 290 series, but still am not getting the picture you are, quite baffled, it makes little sense to me, I would say even your flight looks smoother with 1 gig of vram than my 3. I've tested my mem, gpu and cpu, and no issues or hickups. Thanks for your input.