[jrs99]

You said "Either Jeff types really slowly, or has golden wrists of the gods."

Which made me think you associate slow typing with low comfort and fast typing with high comfort.

I mean that if you switch, you'll be uncomfortable simply because you are not used to it. That will automatically make you slower.

But if you take any keyboard, you can become reasonably comfortable with it, in my opinion, if you get used to it. For example, if you've been using ergonomic dvorak keyboards for many years, then it will take a while for you to get comfortable with a standard qwerty keyboard.

But, that's my case. I'm comfortable with most keyboards that I use for a long time. I guess there are many factors like hand size, finger size, shape, previous injuries/strain etc that could change that.