From what I know decisions haven't been sent out yet, but will be very soon. I would not believe the posts on the results page before someone claims an acceptance on this forum.
I heard from an internal source that Columbia will announce decisions end of February (later than in previous years).
I also applied there and in my personal opinion, it is the best school outside CHYMPS. But it's just my opinion
For those who applied to Columbia: I briefly spoke with a Professor there and was told that they plan to release decisions towards the end of February. If true, that would be later than previous years.