I think there's also much to be said about the "standard" way of teaching typing, which I find to be excessively constraining and inefficient [1]. Instead of forcing a strict "one key, one finger" correspondence, it's better to teach where the keys are, and to encourage the use of as many fingers as possible. It's also not explicitly taught, but the skill of breaking up sequences of letters so that you're typing complete words and common pieces of words (e.g. "ing") is also very important. Fast, fluent typing comes from being able to quickly know which keys to hit for a given word - which finger exactly to use matters only tangentially. I've seen people type 100+ wpm with only 2 fingers on each hand, but they know which keys to hit, and know where the next key they need to hit is.
[1] http://www.onehandkeyboard.org/standard-qwerty-finger-placem...