I agree with Aya somewhat. I think this is a nice, sweet way of looking at something that CAN be defined by statical analysis. Unfortunately, those with the resources, both money and the ability to draw a big enough statistical pool, are not inclined to assist, as it would be for purely altruistic notions to prove astrological concepts correct at this point.
When it becomes sufficiently profitable to SOMEONE to exploit astrology to the individual chart level, someone will indeed put the money and time into proving it. Right now, science hasn't seen the merit yet, and I suspect that professional astrologers are hesitant to "give up" their job security, or just don't have the resources to reach that many people.
Some try, though:
In the May issue of The Mountain Astrologer, Dana Gephert wrote of a the data she's accumulated from hundreds of surveys on women and their Venus experiences.
http://www.mountainastrologer.com/back_issues/bid/2008/408bid.html
Already, insurance companies are doing studies on just such things..
http://www.freerepublic.com/focus/f-chat/1755413/posts
So I say, give it time. It will happen.