Kenpom's algorithm isn't really an algorithm. He has said that he assumes that officials with more experience and that are seen as better officials would logically be assigned to bigger games, so he uses his Thrill Score games as a proxy for the referee ratings.
This year he also includes how much more or less likely refs are to call fouls compared to the average official. High Knees ranks as the 2nd-highest of the top 40 when it comes to calling fouls, behind only Paul Szelc. Larry Scirotto is 3rd-highest...