No i do not know the specific numbers. It's not possible to know what goes on behind the doors of the admission room at Columbia with certainty but i did talk to a few current students and they said the same thing.
I have quite the opposite experience actually. I was told that there are around 200-250 candidates who are being interviewed and the final class size is 70. So it's actually a 1:3 chance that you're in. Maybe your friends were talking about getting admitted to Columbia, as the OR size is quite huge, and there's a better chance there.