Fans (the electric kind)

Why do most (or maybe all?) fans go from off to high, then medium, then low? Why don’t they go from off to low, then medium, then high?

http://boards.straightdope.com/sdmb/showthread.php?threadid=69110

I prefere to call fans **Wind Generators

I thought the question was odd the first time, and I still do. The only fans I have (one at home, one at work) go from off to low to medium to high (actually, it’s 1 to 2 to 3, but it’s the same thing).