Not according to Steam survey. They are doing quite well lately. You have to take into account that Fermi is relatively new. You need some months until you get enough market penetration and mainstream recognition. Evergreen didn't really start selling well until 3-6 months after release. GTX480, 470, 465 and 460 all of them compete against the 5800 series. The combined DX11 share for GTX460-to-480 is 15,72% against 31.13% for HD5800. Twice the number of cards for twice the amount of time in the market. Thanks to GTX460 that will only raise in Nvidia's favor in October, most probably.