Re: Your opinion on the GTX 470 & 480
According to the Anandtech review on GTX 470/480, there is a problem right now in NVIDIA's drivers which causes the new Transparency Supersamping (TrSS) mode on Fermi to run extremely slow with a huge performance hit due to overly aggressive super-sampling. Apparently this will be fixed in a driver release next month so that the performance hit will be much smaller.
[H]OCP used two games (ie. Battlefield: Bad Company 2, and Dirt 2, which represent 50% of their test suite of 4 games in total!) where they showed framerates using the new Transparency Supersampling mode enabled on the GTX 4xx cards.
So to the make a long story short, it seems that TrSS could be the reason why we see unusually low framerates for GTX 4xx cards in two out of four games tested by [H]OCP.