A one or two point change in the "raw score" can mean many places in the rankings. So the rankings are a bit arbitrary to be sure. Self-fufilling, but at the same time arbitrary.It's the big jumps that scare me. Like Tulane going from 45 to 56 or whatever.As for Pitt, I think they've been just on the cusp of the fist tier for some time. Perhaps the addition of scholars such as Richard Delgato (one of the most famous critical legal theorists) helped it climb into the 1st tier. The harder admissions standards couldn't have hurt either.