1. Well I would say that it does give a slight pressure to get an A, but in the end, pre-clinical grades don't matter as much according to PD surveys. Google NRMP Program director survey 2016 (I tried to link it but have a post restriction I guess) . One of the few minor flaws at UT, to be honest. Collaborative as in creating interest groups? or Having a strong camaraderie aspect? Because I would say that the volunteer groups are very active here and also diverse. I get too many emails a day on things to help with or sign up for haha. Everyone is a teamplayer here and its one of the things that we look for.
2. Lots of 1st years will stay on mud island to adjust to the areas of Memphis. After you realize that the city is rather safe after all, most people move to mid town/germantown/ downtown/ collierville(far drive though)
3. Oh yeah, St. Jude is awesome and we are considered the home school so we get first dibs on research spots. During 3rd yr peds rotation, you get a week at St. Jude and you are provided with tons of research contacts throughout the week. Even before that you can also get some contacts rather easily if you have a interest in a field.
Good luck