Here’s what I think is going on:
For those who are CORE and haven’t heard anything post interview for a few months, I think you’re probably waitlisted. Judging from last year, they seem to do a lot of waitlisting after the first few months of interviewing. The reason it’s taking a long time to hear back is probably because they use snail mail for people who are waitlisted (think about it, this takes time as each applicants info needs to be enveloped and mailed, not to mention the recent holidays + move downtown). This also explains why there is so few people on here who have heard anything recently for CORE (they call for acceptances, hence why the person on here who interviewed in December for CORE received their decision). That’s just my $.02