I ended up committing to NYU for this very reason. All the forum's I've seen online have essentially implied that Columbia is always behind on their decisions, pretty much relying on their Ivy status to keep their applicant pool maintained. I've called multiple times, asked for extensions and have been told only 2 more weeks at least twice. I got tired of it.
lol same here but i still haven't heard back- i'm about to just commit to NYU at this point. Congrats though! Have you heard anything about financial aid?