That's a fun game to play when you're really bored. It also feels nice when, after a couple of rounds, it asks you to fill a captcha because it thinks your speed is so high you must be cheating :)

For me my speed varies by what I'm actually doing: typing code, writing emails/comments have different speeds.

Actually, now that I think of it, it's difficult to measure the speed of typing code since a lot of programming involves editing existing code as opposed to just banging out line after line of new code.