I spoke to someone who is an adcom for a certain school (not going to say which, don't even bother PMing me) and they told me their school had more applicants than ever, explaining why I may not have not received an interview (yet). I have slightly above average stats for the school, so it's probably not yield protection. Although I'm taking this with a grain of salt, since it seems like every year schools always say they've received more applications than they ever have.