EVMS Admissions said this? That's interesting, I had no idea.
I don't have hard statistics, unfortunately. I just know that about half of our class came from the waitlist and that your chances are very, very good if you're on the top third from OOS. Also worth reminding that when someone drops an acceptance, they go through all thirds of the waitlist to find someone similar to whoever dropped the seat. If they don't find anyone in the upper third, they'll move to the middle third, and then the lower third.
But ultimately your chances are good in the top third. Not guaranteed, but good.