I didn't care for how Rupp sat and kicked his Sr year, and that method left him way behind for international competitions. However, did win the races.
I seem to remember Rupp taking the 3000m race at NCAAs at fast and breaking the entire field in like two laps, etc. He won every almost every one of his titles in a different way, I think he was purposefully experimenting with winning with different tactics. The people who said he only won because of kicking fixate on the XC title, where Chelange who always took races out fast and would always try to lead from start to finish pretty much forced Rupp to race with a wait and kick tactic anyway.