just another anecdata:
I started learning Dvorak when I entered university, where I learned CS while never having really programmed/coded before (limited to HTML/CSS). Some of my classmates have touch-typed at that stage while I still type inefficiently (looking at my keyboard mid sentence and whatnot). I decided to move to Dvorak to force myself to touch type instead of trying to restrain myself from looking at my keyboard. It took me a whole semester on and off, mostly on learn.dvorak.nl, practicing 30-60 minutes a day. I still type on QWERTY for the first semester, and switched full time when I already feel comfortable touch-typing and preferring Dvorak in the second semester. Related to another thread a few days ago, for me it's not about the speed, more about the comfort (ergo) and not having to break / switch context to look at the keyboard while I code / write. I type at the same speed or slightly slower than I did on QWERTY, but my thoughts flow easier. I use MessagEase on my smartphone for one handed typing.