DMU for one simple reason: class sizes. It will be much easier to build meaningful relationships with doctors/professors when there are only 50 students in the class compared to 100+.
I'm not sure what student:faculty ratio look like at all the schools, but it's a small numbers game regardless. Here's why.
Let's say 20% of all pod students are interested in research (just made that up, for argument's sake). Let's say DMU has 50 students, and Kent and Temple both have 100 students each (again, just very rough numbers). This means there are going to be 10 students per class at DMU that are interested in research, and 20 at the bigger schools.
Let's say DMU has 5 available doctors/professor, and big school x has the percentage equivalent, so 10 available PIs.
Right now you're thinking, "Where is he going with this? At each school I have 50% chance..."
Sure, that's true, but DMU's 50% is a LOT easier than Kent/Temple's 50% chance. At Temple/Kent you need to be vetted by 10 different doctors. At DMU, only 5. This takes up your time, and theirs to get to know them, their research, etc etc.
At DMU those 5 professors need to have 50 interactions (5 profs x 10 students). At Kent/Temple, those 10 professors need to have 200 interactions (10 profs x 20 students). Or, a 4x higher number at Kent/Temple than at DMU.
Realistically though, if you have your act together in class, you can probably get matched up relatively easily with someone to do research. At all my interviews people said, "Research is readily available to those students desiring it." I