Uh, I wouldn't go with US News in judging med school tiers. Georgetown, UC Davis, Tulane, UCI...these were all not in the "Top 50" in 2002. That doesn't make them low tier schools. If you're really interested in finding out the least reputable schools, examine their match lists. The places their graduates match at will show you if the school has a quailty program or not (and how higly PD's regard them).