The Liebowitz and Margolis article doesn't really bring anything to the table; it seems to just be an attempt to showcase market efficiency or something. Take this from someone who is both an economist and have actually tried the Dvorak keyboard: I believe August Dvorak much more than the authors of this piece.

But the nice things about keyboard layouts in the digital age is that it doesn't matter: You can believe that it's all hogwash and continue clunking Qwerty.