As my 10fastfingers profile can attest, my average typing speed in English is 90 wpm (words per minute). To give you some context, the world record is 216 wpm, an average typing speed is around 30-40 wpm, and jobs like secretary often require a typing speed around 50-80 wpm. (Source: Wikipedia)
How did I manage to reach this speed? The answer is simple: I switched to the Dvorak keyboard layout.