I know this is quite early, but yesterday I received an email from U Chicago with an invitation to visit on Feb 2nd (travel and hotel expenses paid). I applied to the biophysics program, whose deadline was on December 15th (I basically submitted at the deadline).
I'm very excited, of course, but also a bit incredulous: does this mean I am most probably already accepted or might there be some kind of interview (perhaps this is just first round)? So I would appreciate any thoughts: for most programs, does an offer to visit (with expensed paid by the program) imply that you have been accepted ? Thanks!