As someone who touch-types Dvorak at home, and has to switch back to QWERTY at work, I think I can safely say my experience trumps your few symbol keys moving around...
Why aren't you using Dvorak at work? I use Dvorak at home and on my work computer as well.
And 600HP is nothing. I've got a good friend from college who gets almost 1200HP in his GTR (1192 WHP / 1402 crank, actually). I don't see him wrapping it around vertical objects.
The GTR (unless you are referring to the Ultima GTR) is front-engined and all-wheel drive. One with 1400 hp probably has a tremendous amount of turbo lag as well. I really don't think you can compare that to the mid-engined, naturally aspirated V10 Carrera GT.
** Seriously, I haven't seen any other desktop do that. Granted I've only ever used Windows and Gnome, but neither of them does it. Is it really so hard to remember the open applications as shutdown and open that at startup?
Xfce does this as well. I'm running Xubuntu 10.10 on my laptop and this is one of my favorite features.