Schools all have their own definition of "waitlist" including alternate, deferred, and waitlist. This skews the numbers depending on what the schools choose to count as a student getting in off of one of these lists. Wayne's waitlist is really just a glorified alternate list since they take people off throughout the year. Additionally, Wayne's class size is 290, so I think it is unreasonable to think they admit over their entire class size from the waitlist. So many students would have to turn down the acceptance from the waitlist to get that value (also it was exactly 300/600? those numbers are too perfect to be real and are estimates at best).