2 weeks for me, however, I'm an international applicant and have a modest GPA, so I was never expecting to be flooded with invites, anyway. And the one school where I think I have a decent chance (Minnesota) hasn't even started reviewing apps yet. Plus I also have one guaranteed interview in Canada in February/March, so I know I'm getting at least 2. Plus I think I have a very good chance of securing an interview at one of my provincial schools (U of C), so that's more good news I hope to hear in February.