The group over at Know Your Meme has released it's findings after quite a bit of information gathering that has been plugged in roundups and over there. It covers all sorts of demographic information, from location to pony preferences, between 3700 participants.
It's actually pretty cool to dig through the graphs and see what exactly these guys came up with. Hopefully some day we can gather all ~800,000+ of you and get some full fandom results! I guess that's a bit too far though.
Check out the results of the survey here, or (Hopefully) embedded after the break!
Survey of the Brony Subculture