Oh come on, you have all your vowels and other frequent letters right there on the home row. There might have been some issues with the studies that were supposed to show Dvorak's superiority, but if you take a cursory glance at the layout it should be immediately obvious that your fingers will need to travel less because the layout conforms much better to the observed frequencies in most languages.
Vowels and frequent letters? For one I am a programmer, not a writer --my frequent keys are widely different than a typist's.
Second, who said having the all on the home row is better? Studies --nit Dvorak's own-- have shown marginal or no improvement compared to qwerty, ven for typists.
Identifiers in source code are typically base on words, so will share the same distribution of English text to some degree. It should be easy to make a program that takes any text file, and for each character notes how far your fingers would have to move from the home row on a certain layout. This could then quantify the distance on qwerty vs. dvorak. That would provide an interesting empirical verification of this issue.
About the having keys on the home row, I certainly claim it is better, and you should try it for yourself. I will concede that it may not give a speed increase for a seasoned typist, I suspect that at a certain point when everything is in muscle memory it doesn't matter anymore. However, having to move your fingers less is simply less straining, so it will be more comfortable. This was not measured in those studies, so that's why I think they are not relevant.
