Here are my numbers ... So Wot
Just did the HTML testy-thingy on me old iMac Core 1 Duo 2.0 GHz RadeonX1600, OS X 10.4.11
Opera 9.26 : 13 fps
FireFox 2.0.0.12 : 7-8 fps
Safari 3.1.1 : 13 fps
And on me Core 2 Duo 2.4 GHz Radeon HD2400 Pro XP sp3 (32bit OS)
IE 6 : 20 fps
Firefox 2.0.0.14 : 20 fps
Safari 3.1 : erratic between 14-24 centered around 17 fps
But on the same PC running UBUNTU 7 (64bit OS)
Firefox 2.0.0.12 : 10 fps
So that's a fact, maintaining UI consistency across different fields displaying the same Object comes at an overhead in COCOA and a F5 key stroke on Windoze ...
But is this test meaningful? Looking at Ubuntu, I'd be tempted to say no.
Anybody with set of figures on a G5 ???