I was lucky to never have properly learned to touch type on QWERTY in the first place, I had key positions memorized but I always used my index fingers - it actually hindered me from touch typing as the bad habit would always creep back up. Thus I forced myself to learn from square one with Dvorak, not having the keycaps on my keyboard to fall back on - it was painful, but I'm glad I did it.

Now 15 years later I really enjoy the flow of the layout, a majority of the time when typing you alternate between sides of the keyboard when typing and it just feels good.