Here are some facts about Dvorak that are easy to verify and the utility of which is obvious:
- Dvorak has the most used keys on the home row. Compare: AOEUIDHTNS VS ASDFGHJKL;
- Dvorak optimizes for alternating hands, which obviously helps speed. Ever tried typing "street" or "states" in Qwerty, two common words with common letters that you have to type all with the left hand? On the Dvorak side the worst word is "joke" I think.
- Dvorak optimizes for typing a bit more with the right hand instead of the left hand, which makes sense because the right hand is usually the strongest.
- Dvorak optimizes for typing from the outside to the inside (try tapping your fingers in rapid succession on the desk from outside to inside, then inside to outside, and you'll see immediately which one is easier and faster).
- Dvorak optimizes for typing more with stronger fingers (index and friends) than weaker ones (pinkies and friends).
- Dvorak has all the vowels on the left hand on the home row (except Y which is conveniently on top of I), one beside another, which is great for learning. It also makes sense because you use consonants more than vowels, (see right hand argument) and since the most used consonants are on the right home row, it optimizes alternating hands.
No need to mention Qwerty makes no such optimisations and the result is correspondly atrocious.
See? No need to bullshit with biased reports about history.