So what I’ve read is that these batch acceptances that are used by some universities approach the batches by the endpoints first. In other words, clear strong acceptances (based on school’s needs/values/etc and application strength) go out early, as do clear strong rejections, and all but top waitlists go out early, too. Then they slowly release the next set of decisions depending on responses from acceptances.
So my understanding is that if you are very high in waitlist, they are holding on to you, which would make sense, but I don’t know. It makes me very nervous that my son is just hanging there. He had been so extremely excited about Purdue CS, although he is OOS. He is beginning to dampen his enthusiasm. He has an acceptance to another school that he is very excited about (with good merit aid), so I am no longer holding my breath. But he said he would have a hard time deciding between that school and Purdue.