Cool experiment. Would luv to see the results of that on a large basis. While astrology can be fun and interesting, I don't think it's anything more than a combination of confirmation bias and coincidence.
That being said, way back when I was in high school, my father knew a math professor who was also a professional astrologer, and one year for Christmas got from him and gave to us as a present a full scale birth chart reading--multiple, single-spaced pages, including all sorts of things such as predictions for the future and even descriptions of past lives. It was really, really intriguing. Every once in a while I take it out and look at it for the fun of it.