I used to think that when an application was deferred, the adcoms just wanted to hold your file for a little longer till they get a picture of the applicant pool. However my girlfriend recieved a deferred decision from a school like 2 weeks ago (she applied in mid december) which doesnt make a whole lot of sense considering it is now April 2....how much more could the applicant pool change? Are deferred applications essentially waitlists?