So I had my interview with Chicago a couple of weeks ago and my interview with Wharton last week. I would say they both went okay, but not great. I don't think I left a lasting impression or anything, but I also don't think I screwed up in any fundamental way.
My Chicago interviewer was a nice guy, a second year planning to stay in Chicago to do finance. I think he literally said "wow" after every response I gave, so it was hard to get a read on him. He had a good bit of follow up and seemed to understand my line of work. My interview lasted about half an hour.
My Wharton interview seemed a little cold and overly "procedural". Essentially it was a walk-through of my resume, four behavioral questions, and a "why MBA and why now?". My interviewer was an admissions committee member, so it was difficult for me to talk about my experiences without getting into too much jargon. Also lasted half an hour.
I want to get into a more detailed debrief after my decisions to both of these two places come out later this month.
Also still holding my breath for a Stanford invite. According to the GMAT Club forums, only 2 people have gotten invites so far, but it seems like everyone seems to "know" 1-3 people who've received invitations. Waiting for my Stanford application decision is like watching a pot boil, so I don't want to speculate too much about it.
I also need to start filling out my CBS financial aid forms.
I'll be back later this month to go over my final decisions.