It degraded considerably from 8.10 to 9.04 on Ubuntu with my 4G. NBR was fluid to use. NBR now is clumsy as hell on it. Before, I could actually get Caster to play on the thing- as in ~19-22fps play. Now...I'm doing good to get 10fps. No, I'm not "gaming" with it, but a drop of that much performance isn't really acceptable.
If you are using integrated Intel graphics it is unlikely you are a gamer. If you have a normal system then Ubuntu Jaunty will work fine for a normal 2d desktop. Even my EeePC 900 with a 900 mhz single core Celeron and 1gb ram works OK as a normal Web surfing emailing computer. TV show avis play full screen and smoothly with Compiz desktop effects enabled. Flash videos on YouTube play OK in a window but are a bit jerky full screen, but YouTube videos have always looked awful full screen. Only jump through these hoops if you are having problems or desperately need the increased performance.