I understand. I too can only speak to what I have heard between a couple of interviews and talking to adcom on the phone. My understanding is that the national range for acceptances per spot is 1.8 to 5.5. So with the exception of Nova offering hefty scholarship dollars to every accepted student who has multiple offers, it would be surprising to see them not take at least ~30 off of the waitlist.
One of the reasons some accepted students are holding off on declining their acceptances has to do with seeing exactly how much money Nova is willing to shell out to make offers from "better" schools less appealing. However, even in those cases, out of state students tend to want to stay close to home and when the deadline to decide comes, most people will not take a chance on a new school over a more established one.