Between the Trek thing I linked and the thing that Boyd linked, that's a pretty compelling argument.

A "windy" US city sees an average of <9 mph wind during the day. That's measured at an airport weather station, high up, in clean air. Down where your wheels are, there's less wind than that. People always toss around "oh yeah, I ride in 25mph wind all the time..." When it's actually blowing 25, you go outside and you notice that it's windy before you notice that it's pi**ing down rain - that's how windy 25 is.