A lot of that has to do with newer games and better optimizations hitting for those games. If you look at the games listed, they all have been out for quite a while, it wouldn't be shocking if Fermi had highly optimized drivers for those titles right at launch(again, I think the chart itself is total imaginary BS, just stating high profile games used in almost everyone's bench charts are going to be what any smart GPU maker optimizes for first).
With all the time they've had they better have some good drivers out.