Alleged 2.1 slowdown explained
I am not sure if this has been brought up before (searching the forum for 2.1 brings up about 10^123 results) but ZDNet aired an article with a video of 2.0.1 rendering a 2d ball at 2x the speed of a 2.1 ESE81 Droid. The 2.1 phone seemed speed governed at 30fps and I believe that is exactly what it happening, in an effort to save battery 2.1 is preventing the phone from working harder than necessary i.e. more than 30fps.
Edit: Wouldn't want to get attacked by a parrot, http://blogs.zdnet.com/Burnette/?p=1895