PenguinTrax posted in August 2009 that typically 1200 girls go through fall formal recruitment and that 60-65% of those girls get bids.
http://www.greekchat.com/gcforums/sh...d.php?t=106740
Keep in mind that many, (perhaps most) of the girls who do not get bids drop out during the process of recruitment for various reasons.
FSU rush is very competitive, and you will need recs for every house. Just be well prepared going in, and tell yourself that no matter what, you'll see the process through to preference. Many girls change their minds about houses as they go along, sometimes several times! So if you stay flexible and open-minded you'll have the best chances for success.