You do feel the difference when you are on a Mac. I was using a Windows 7 netbook for a couple of weeks and watched flash on Youtube.com without any issues. Last night went back to my Macbook Pro and the same flash video turned my Macbook into a jet plane. I can imagine the amount of energy is being wasted on the processor and the fans to cool it while it's being worked by Flash.

Adobe is finally moving some of the flash processing to the GPU. Too little, too late? Or better late than never?