OMG no it does not, your argument is ridiculous. You have to learn all the fingers and then all the keys before you can touchtype, no matter what layout you are learning. You can't efficiently touchtype 20 letters of the alphabet then take your hands off to hunt and peck the rest on a dvorak or a qwerty.

What letter you are instructed to learn first is immaterial. (and in GP's example, since I was taught by the same system, you don't learn semicolon as your 3rd letter, he just threw that in; you learn to rhythmically intersperse pointers (index fingers) and thumbkins/space first, then you add in tall-men, interspersed, etc. then moving between rows.)

what you are trying to connect your argument to, unsucessfully, is the idea that index fingers are naturally the best typists (coordination, musculature), so "let's give them the most common letters to type", which dvorak does. But this also implies, btw, that your worst finger, pinky, will over time also get the least exercise, so the gulf between its skill and pointer's skill will grow, not shrink. (I'm not saying that's more than a 2nd order effect, just sayin, muscle memory, 10,000 hours...)