this rings true actually. I had a friend who typed with just the three fingers on the right hand while the left hand hovered all of the most essential letters

this rings true actually. I had a friend who typed with just the three fingers on the right hand while the left hand hovered all of the most essential letters with all five fingers. it seemed to work pretty well to just have one hand hunting around the keyboard. That said, it might making correct shift-usage correct which can negatively affect the other hand. That being said, I have my laptop on my lap right now and if I have one hand on home row, and the other hand just kind of idly floating over the right side of the keyboard, when you go to place the fingers on home row, you can really feel in the wrist and forearm the muscles pulling the hand "outward," in relation to the rest of the arm. This, incidentally, is where a lot of my RSI-type pain has come from. The elbows going out, fore arms craning inwards, and then the wrist pulling to straighten the hands back out is a recipe for pain.