I have registered just to make sure that prospective MA students won't be misinformed by biased and highly subjective posts.
As of Fall 2013, admission to Columbia MA MODA program was at 27%; 30% for the regular MA program. (http://www.columbia.edu/cu/arthistory/graduate/)
According to CAA guide, 390 students applied to NYU IFA last year (including PhD, MA, and Conservation) and 109 were admitted. Although admission process is different for each of their programs, the overall acceptance rate is, inevitably, at 27%.