Yes, they do not start pulling from the waitlist until May 15. This was posted on May 7 of 2012 in last year's UF school -specific thread by millie44:
"UF does over accept students. I called the admissions office last week to ask about waitlist movement. As of last week when I called I was told that there are still 155 people holding acceptances. The goal class size is 135 students. So he said 20 more students would have to withdraw before anyone would be moved from the waitlist. He suspects that most of the withdrawals will come on May 15th, but there is still no guarantee that they will need to go to the waitlist. Hopefully we will see some movement soon!
"
So, if you're a fellow waitlister like myself, start forming back up plans NOW. IF this is true (which we don't know because it wasn't actually posted or endorsed by the UF COM, and likewise, I do not endorse it so do not quote or credit me), and based on the fact that they offered 220 acceptance last year out of roughly 370 interviewees (they told us this on interview day this year), 220 - 155 = 65 admits from the wait list. Subtracting the 155 from the denominator of total interviewees, 370 - 155 = 215. So, based on these assumptions, here are your odds: 65/215 x 100 = 30% chance of being accepted off the waitlist. If you attempt to contact the office about this they will not comment; however, they have been very nice and helpful with advising me about back up plans. I think they want to avoid giving people false hope, which I can respect. But think about it... if you interviewed in Sept or Oct, then you interviewed early. If you interviewed early, you got their attention quickly. It would make sense that they would interview the candidates about which they were most excited first, so that once accepted, they could recruit them. Other schools will be trying to recruit these "stellar" applicants, and UF wants them too. Early waitlist students are probably the result of a high level of uncertainty regarding whether or not more stellar applications come down the line. In my case, an academic rough patch in my 3rd year of undergrad likely caused this. This is all speculative, and as long winded as it is, I hope it offers encouragement to many of you. For those already accepted, again, congratulations! Everyone in my interview group was a superior candidate.