He's not the best candidate ever, but he's the most experienced and the most conservative of the three.

The US Navy did a significant test of dvorak and found that the typists ended up 74% faster on dvorak keyboards than qwerty. Now yes Mr. Dvorak was administering this but i dare say there were outside observers.

Dvorak typists were also excluded from typing contests for years because they always won when they were allowed to compete.

From personal experience i can tell you that it is far more comfortable to type in dvorak for most tasks.