Google Chrome 5.0.366.2 dev* 1fps
Apple Safari 4.0.5. (531.22.7) (webkit 56958)* 1fps
Opera 10.52 3337 41fps
Firefox (Minefield) 3.7a4pre 16fps
IE 8 1fps
IE 9 Platform Preview 4fps
apparently webkit has a problem with the test as you can see when loading with chrome it gets to 29fps but then it crawls to 1fps. Same safari.