I have a few comments about the addendum that was posted to the STRAIGHT DOPE article Was the QWERTY keyboard purposely designed to slow typists?
The Dvorak keyboard layout is not a scam. The old Margolis and Liebowitz article that was cited is about economics, not ergonomics. As convincing as its rhetoric seems, that article serves its own political agenda, and not the truth. If you care, some years ago I posted some more specific criticisms at http://www.mwbrooks.com/dvorak/dissent.html My apologies for any link rot.
However, no argument for or against the Dvorak layout is relevant to the article’s title question. (Nor, for that matter, is the title question relevant to the benefits of Dvorak–I think Dvorak proponents should pick better arguments.)
I don’t think anyone disputes the claim that Sholes rearranged letters in the type basket to reduce jamming. But the effect of that is widely misunderstood. Because his typewriter used a full circular type basket (obsolete by 1900), separating letters in the basket might or might not separate them on the keyboard. The effect was essentially chaotic.
I’ve found no historical sources to indicate Sholes gave any consideration, either way, to how these changes affected the typist’s motions. Certainly he could not have considered the effect on efficient touch typing, because at the time touch typing had not been invented. Some time later, Sholes himself patented an improved layout that seems to have anticipated some of the methods used by Dvorak.
So the answer to the question is no. However, there have been those who say if Sholes had intended for QWERTY to encumber the typist, he could hardly have done a better job! Personally I’m not convinced QWERTY is ill-adapted for the four-finger typing that prevailed in the 1880’s. What I can say for sure is I know a lot of people who have tried both QWERTY and Dvorak, and like Dvorak better.
I would like to say one more thing about the Margolis and Liebowitz articles. I know of at least one person who switched from QWERTY to Dvorak, liked Dvorak better, and was doing well with it. Then he read one of those articles decrying Dvorak and switched back to QWERTY for no other reason! That, I believe, is tragic.