I haven't got an official response either. In fact I wrote to GSAS and got no response from them. But I was feeling very anxious about keeping the other schools waiting, especially since I am in regular contact with the POI at those schools. So I wrote to a Prof at Columbia, who informed me that the class had been admitted and was surprised that all the letters have not gone out informing applicants of their status.
I have no idea why GSAS hasn't informed me of the results as yet and yes, they did update my GRE and Toefl scores around the 20th of March. But I don't understand what difference my GRE score would have made if I was already rejected from the department? I think they might offer us an M.A, but I cannot be sure and personally it makes no difference to me. Either way, I was really disappointed by the lack of responsibility towards their applicants.