The key jumps were absolutely smaller. Without a shadow of a doubt. Eg I didn't feel like my fingers were dancing around the keyboard, but I didn't enjoy it at all. Hopefully the smaller 40 and 65% keyboards I've ordered will alleviate this.
Oh, you're talking about the specific technical advantages of the physical shape of that particular product, not the Dvorak vs Qwerty letter arrangement? My bad assumption, then.
Myth. If it happens to work better for you, fine, but pretty much all the claims made about Dvorak and the criticisms of Qwerty are 24 carat bullshit.