Given that Wayne State's goal (according to an info session someone this summer went to) is 1500 interviews (1.5x the typical amount) and they're currently at 1,263 interviews sent, they have a little over 200 to send out which sounds reasonable (Tufts has a similar amount left to send). Schools usually accept 2-2.5x the number of applicants they plan to admit with the knowledge people will choose other places. Since Wayne State admits 290 students a year, they're probably looking to accept 580-725 students throughout the cycle (including taking off waitlist). At 600 interviews completed, they have accepted about 1/3 of the people they accept and with the 600 still to go (half) still to go. This means if they're going at the same rate that they have been, they'll have about 500ish acceptances by the end of their cycle of 1500 people interviewed which makes sense given how they noted they wanted to be conservative with their acceptances this year (mentioned somewhere above). As for if it's normal, it seems reasonable at the least) for what they want to do. As for the mid October completion date, they've gone through a lot so far and you're not out till you're out so just hold out hope.