It seems like you're implying that the number of real estate pros is less than 13%. I think Trulia would be very happy with that because the brokers want to be where the buyers and sellers are right? A broker heavy community might be fun for you guys but it won't make you as much money.
http://www.truliablog.com/?p=210
Interesting that comscore has them skewing female with 55% of their traffic female and 45% male.
