I had two one-semester typing classes in junior high school on QWERTY (with
mechanical typewriters, no less), where I got up to 70 WPM on speed drills. Then in high school my mom got "Mavis Beacon Teaches Typing", which got me up over 100 WPM on speed drills. A few years ago one of my friends introduced me to typeracer.com, where I consistently clocked between 110 and 120 WPM, still on QWERTY, on the default Dell keyboard that came with my workstation.
So I bought a mechanical keyboard and decided to switch to Colemak, which someone had mentioned on the site. But my numbers on typeracer still only hover around 100 typically, even after a few years of Colemak; presumably because I haven't been drilling the way I did when learning QWERTY. But my hands are certainly a lot more comfortable, and I'm pretty sure if I did drill I could surpass where I was before; so I don't regret the decision.