While a QWERTY typist might mistype "dog" as "dig" or "dpg", as I and P are adjacent to O on the QWERTY keyboard, a Dvorak-using typist would be more likely to mistype the middle letter as in "dag" or "deg", as A and E are the letters adjacent to O in that layout. In chat, I smile on the rare occasions when I notice that someone is using Dvorak based on a typo they make, a Dvorak Typo.