I got shitty tearing with vsync off. Nobody responded to my post of gripes, so I guess I was the only one seeing some flaws.
anyway, I was on 169.15 beta drivers, just updated to the 175 WHQL drivers, hopefully some of the issues I ran into were solved.
edit: The B thing makes me question the Benchmark a bit. Also, in the last scene it was clearly dipping to the 30 range towards the end, yet the FPS counter didn't pick it up. ?