i heard back from umich, yale and duke quickly enough from what i understand (about 1 month to 6 weeks after 2ndary). BUT i know people who didn't even interview there until like feb/march, and were accepted.
yale is non-rolling. no acceptances/rejections send out till about the 3rd week of march. michigan is rolling. acceptances/waitlists are going around now, but i don't think we've seen any rejections yet (?? correct me if i'm wrong). duke is non-rolling, their batch of acceptances/rejections/waitlists are sent out the end of february. i can't help u w/dartmouth. sorry.
breathe. 🙂 you'll make it. 🙂