I am a QWERTY touch typist and I do not, nor do I twist my wrist to hit those keys with my ring or middle fingers. Rather, I move my hand to the correct position. Touch typing does not mean your hands have to remain in one location, unless of course I am misapplying the term.

Likewise. I am a touch typist in that I can type while the keyboard is nowhere near my field of vision, I may not be a touch typist by any more specific definition (I certainly don't consciously follow a particular approach). I will move my hand to be more or less centered on whatever I'm doing, only twisting it when I need to hit several keys at once (which seems likely to be necessary with any keyboard).

Incidentally, the reason I did not switch to Dvorak long ago was that my vim keybindings work much better with a QWERTY layout and I was not willing to remap those.

This is the kind of thing that I'm worried about. Changing over any particular application is undoubtedly doable. Changing over everything is undoubtedly a headache, and in some cases may not even be possible (flash games, say, not that I play a lot of those).