A fair number of schools simply have not made all of their decisions. Just to take a snapshot:
According to their website, BU is only about halfway done with making their decisions (roughly 15 decisions every other day, with 210 applications). Columbia may not finish making all decisions until Thursday (or so the dept. secretary says). Looking responses at previous years, Harvard may not available until March 1.
If more than one person posts on the admissions board from one of my schools, then I typically call the department.