For the uninitiated, Sagarin's rankings are one of the computer rankings used by the BCS. As explained on his site, the BCS uses his rankings that ignore final score (called ELO Chess), but he also publishes rankings that only take scoring margin into account (called Pure Points). Sagarin writes that the Pure Points metric is the single best predictor of future games.
This is the first week in which preaseason predictions don't bias the rankings and Michigan is ranked 10th in pure points. Last week they were ranked 9th in the same metric.