I don’t have the article, but from what I remember reading, once you learn a particular keyboard layout, one isn’t any more efficient than another. Qwerty isn’t any better than a random placement or alphabetical.
I do know that the fastest typists tend to use a Dvorak keyboard, but that’s probably due to self-selection. (I am in a typing contest, therefore, I’ll use the more efficient Dvorak keyboard). That’s not proof that the Dvorak is more efficient, but that the best typists think it is.
My personal experience with Dvorak have been middling. I tried it for a couple of weeks, but never got as efficient as I am with a QWERTY keyboard. No doubt that if I continued with it, I’d do a lot better, but it simply wasn’t worth it. Even after a couple of weeks, I was still only typing about half of my speed, and making more mistakes.
Why did QWERTY win out? Remington, the largest typewriter company used it, and that’s what everyone got use to. Since other arrangements weren’t any more efficient, there was no upside for competitor to use another keyboard arrangement. The best typists used the QWERTY layout, and since alternate arrangements weren’t any more efficient, there was no upside in being different.
I don’t believe that the Dvorak keyboard is all that efficient when it came out back in the era of manual typewriters. If I was building an efficient manual typewriter keyboard layout, I would put the most used keys in the center and the least used on the outside. That way, the more common letters are hit by my strongest, fastest, and most coordinated fingers while the least common letters and symbols are used by my pinkies.
All modern computer operating systems support Dvorak keyboard layout. On a Mac, click on the “Language and Text” System Preference, and you can choose from four different Dvorak layouts. On Windows, go to the Text Services and Input Languages Control Panel, select the Languages tab, and then the Details tab. Then click on the Add button and select the keyboard you want to add. Show the language bar on the desktop to make it easy to change from one layout to another.