Same here, I emailed the admission office and their response was really vague. And it sounded like not all applicants are getting interview invites. Honestly, if I were you and given that responses need to be made by the 15th, I would just go with NYU. It's one of the first few earliest schools that offer a data science master program, which speaks to its credibility. And if time is not a big problem for you, 2 years at NYU would definitely give a better learning experience than Columbia.