Obviously Flash on Windows is going to be tons faster at playing these animations but I viewed 2 advanced with Flash 7 and 8 on a DP 2.5 with 4.5Gb ram and the site played at a respectable speed no stuttering or slowing down though with Flash player 8 I notice areas where the animations as I mentioned previously that are not refreshed seems to disappear. I see the animation playing the pre-loader popping up smoothly, lines zipping around, content popping in, the rendered water scene playing etc without any delays or stuttering, then again viewing the site on a Mac Mini or iMac I'd probably get the impression too that 2 advance is choking the cpu with all the vector tweening and so forth.