I've recently had to readjust the way type to be more wrist-friendly since I've been seeing the beginning (intermediate? God I hope not...) stages of repetitive stress injury. And that's on my relatively ergonomic macbook air, which from what I've read is designed from the start to prevent that sort of thing. I cringe to think of the kind of damage I'd do to my wrists from developing on one of these things for any pe…
IMHO, YMMV etc etc.
I can also go much faster on a model M or cherry.