IR subfield. I do not know how PSU typically treats their waitlist, but in the email it says that I am on a "very short waitlist" that they hope they will be able to move through quickly, which makes me think they do offer acceptances off of their waitlist.
Longtime lurker first time poster but I'm also claiming a UC Davis admit. The email came at 10pm EST on the dot. I was also waitlisted at Penn State today.
IR Subfield