Of course there's numerous examples. And am not referring to skorts.
http://www.copenhagencyclechic.com/2...ses-cycle.html

http://www.copenhagencyclechic.com/ (meaning the photos for above knee dresses/skirts on bikes)

I've never cycled in a skirt, long or short. But for short, above knee, I probably would only do it on a shortish route that was flattish and not tons of cars or many pedestrians nearby.

Still, I'm the sort of cyclist, that doesn't want to think about my clothing fit while I'm breezing along.