Do you mean that wearing the skort makes it easier for people to tell you are a woman, not a guy, and thus, they are a little more polite to ladies?
That's an interesting observation.
On one hand, I like to think that I don't need special accomodation just because I'm a woman, but on the other hand, anything that makes drivers pay attention and give me the room on the road that I deserve is appealing. Especially if it helps me not get run over!
Oh, how I long for a more bike-friendly driving population.
Let us know how your "science experiment" turns out!