Well, let me clarify that 3 months thing... I was up to a decent speed within a few weeks, but it took me a while to get to the point where I was noticably better on Dvorak than qwerty. Some people could probably learn a lot faster than me, though, I know it takes me a long time to do this kind of stuff. Certainly in a month I was good enough it was no longer painfully slow. 🙂
Also, I was switching back and forth between qwerty and Dvorak a lot, between my home PC and other computers, so that may have had something to do with it, but I also did want to ensure that I didn't lose qwerty in the process.