English is heavily left-handed
It turns out that when using a QWERTY layout keyboard, English is heavily left-handed. By that, I mean that characters on the left side of the keyboard occur much more frequently than those on the right hand side.
If you go by the relative frequencies of the letters in the English language, and assume a keyboard split like the Goldtouch keyboard, it turns out that characters on the left occur 58.73% of the time, and those on the right 41.3% of the time. This is certainly not helped by the fact that the right side has 11 letters to the left’s 15.
Add to that the fact that if you’re an Emacs user (like me), then some of the most common commands and command prefixes (Ctrl-A, Ctrl-E, Ctrl-X, Meta-X, Ctrl-C, Ctrl-R, Ctrl-W) all use left-side keystrokes, and you end up with an even heavier leftwards tilt.