Unfortunately, that article isn't really so much a defense of Qwerty as it is a defense of free-market fundamentalism. The writer doesn't seem to care as much about usability as he does about attacking the credibility of as many free market-mistrusting Dvorak supporters as he can track down. Not to say that he's necessarily wrong, but the article is really only superficially about keyboards.
Ultimately, it is indeed not as clear-cut a situation as it's made out to be, either in Dvorak's or Qwerty's favor.
Ultimately, it is indeed not as clear-cut a situation as it's made out to be, either in Dvorak's or Qwerty's favor.