Very interesting. I figured you were crazy, luckily the wiki is still up, and lo! You're right!
So thank you for the education, although I actually don't think that changes my point terribly much.
Orange County with 3,000,000 people over 1000 sq. miles dwarfs most of the other entities, including Manhattan.
I would think that without an explanation of why they are an outlier, a population this size, this diverse, over a diverse geography (flatland, hills, mountains) would regress towards the mean. If they are dramatically outside the mean (and here they are far and away in the lead), there needs to be an explanation.
(I liked two explanations: one is that they are counting surfer's beach cruisers would could be a very real effect down in OC which has great surfing and lots of trends toward surfing style. And the other that suggests these bikes or similar may be very popular among latino populations for some unknown reason.)