Thank you everyone for the congratulations! It's still a bit surreal to me. I have to keep checking my phone to make sure they called and I wasn't dreaming.
svrider, I really like Ross's program, but I'm already in Chicago and I hate packing. Plus the person moving with me (if we move) currently only has a job in the Chicago area. It seems much less likely that I'll be able to pick up and move to Michigan even if I do get in. Oh, plus I can get a puppy if I stay in Chicago (a bribe from the significant other to stay).
I'm going to wait until next week before I take myself off the waitlist at Michigan. I went to Chicago undergrad, so I still like the idea of academic diversity. Hopefully Michigan will just reject me so that I don't have to think about this too much more!
Otherwise it'll be a hard decision to make and currently, I'm just savoring the thought of quitting my job.
As for getting off the waitlist, I knew my application was weak in GPA (2.83) and in GMAT (690--70% Verbal, 85% Quant). Once on the waitlist, I re-took the GMAT and got a 730 (89% Verbal, 89% Quant). In my 1 pg update letter, I reiterated my desire to go to Chicago and discussed some developments in my extracurriculars: I'm teaching a summer program at the non-profit I volunteer at, and was asked to join the advisory board. I had a colleague write an additional rec for me. I work with this colleague a lot, but I don't technically work for her, so I thought it offered a different view of my management style.
I do think the fact that I'm a girl helped me get off the waitlist. Slightly sad, but I'm too elated with getting into school to actually care.