You may be confusing University of Rochester with RIT (Rochester Institute of Technology). UR is a pretty middle of the road school, nice medium size, wide range of student majors and interests, yes STEM/premed common, but for sure not like MIT/CIT/Carnegie Mellon. Plenty of frats/sororities. Think cold and grey, if you aren't used to the Great Lakes region, the weather can be depressing (but there are lots of college towns with the same type of weather that are very popular, ie Ann Arbor, Pittsburgh, Syracuse)