So Flash on OSX has been complete crap for years because...? And you want me to believe that "oh, on the iPad/iPhone it will be different" because...? Oh, right, 10.1 will fix all sorts of problems that couldn't be fixed for years because...?
Mostly because of inaccessible layers of code, not much to do with Adobe, more to do with apple. If apple would open up some of the lower layers then this stuff could get a lot faster.
And how is it that other third party software mysteriously has access to APIs that Flash allegedly doesn't? For example, MPlayer is able to offload work to the GPU.