Hey! I just barely found this forum and am also in the boat of being waitlisted at Austin (I did post my results). I was starting to think they hadn't sent any offers yet and just waitlisted people to buy some time so I'm glad I'm not the only one with that suspicion.
I have an offer at another program that was putting some pressure on me to give them my decision early, so I emailed Austin multiple times to see if they had an updated timeline for the waitlist decisions and got no response. I guess we'll just have to wait and see!