YMMV, of course.

I agree that Carpal Tunnel is not to be taken lightly. I also agree that mileage varies with the individual.

I've seen a guy out of university trying every technique to look after his sensitive wrists, including standing with a neck strap attached to his keyboard (much like a guitar).

As for me, like I said, I make sure I hit each keystroke with a reasonable amount of force. I've only met one person who types at the same rate as me with the same high accuracy. And I've been doing it for about 12 years seriously. My wrists are fine. Actually the most screwed up my wrists ever got was in high school doing final exams with a pen and pad.

All I'm saying is look into whatever technique you find suits you best. Dvorak is a solution. But either way you're going to be doing a lot of keystrokes in your career - and trying to absolutely minimise the amount of typing you'll have to do (e.g. saving 5-10%) isn't necessarily the best answer.