Too bad the original post doesn't accept comments.<p>Yes, Mac performance can be an extra challenge -- think of discussions in 3D, video-editing, or gaming communities. Things get more complicated when you're in a browser -- particularly on a Mac, you can see changing performance when changing browsers. Video will continue to further improve on PCs with hardware decompression, but on Macs Adobe is still hoping to persuade Apple to open those APIs to browser plugins. Adobe's own goal is to make things transparent across hardware/OS brands. And Adobe is interested in adding authoring-support for "HTML5":
<a href="http://blogs.adobe.com/jd/2009/06/adobe_on_html5.html" rel="nofollow">http://blogs.adobe.com/jd/2009/06/adobe_on_html5.html</a>