そう言われてみると、そうですね。どうしてRobert Parkinsonは『The Dvorak Simplified Keyboard: Forty Years of Frustration』(Computers and Automation, Vol.21, No.11 (November 1972), pp.18-25)で

It turns out that this keyboard was designed experimentally by Christopher Sholes, the inventor of the typewriter, to SLOW THE TYPIST DOWN. … What he actually did was to make many commonly-used letter sequences awkward and slow to execute. Thus by "anti-engineering" his typewriter from a human factors point of view, he was able to slow it down so it would function to his satisfaction.

なんて強く言い切ってるんだろ…。