But i disagree with John Gruber.
#1) Flash is not "slower" on Mac . It uses up too much resources compared to its Windows edition. I switch between Windows(work) and Mac (personal) all the time and i have never seen anything Flash playing "slower" on mac.Flash makes use of GPU access (if required) not just for video playback. I assume Adobe's excuse for resource hungriness is , 'too much time marketing'?
#2) As http://www.apple.com/quicktime/guide/hd/recommendations.html suggests, without a card you are going to experience crappy playback for HD video on Quicktime,Flash plugin and everything.
#3)John is comparing native desktop video playback tools to a plugin that lives inside a browser.
Lastly.. read staunch's comment.
Why doesnt John have comments enabled in his blog?