http://basketballpredictions.blogspot.com/2014/03/how-well-did-computers-predict-field.html
"In general, we see the same results every year. The RPI and Sagarin PURE_ELO, as measures of resume quality, are always pretty close to the final Selection Committee results. The Sagarin PREDICTOR and Pomeroy ratings, as measures of team quality, are pretty far off. As I've said to the point of boredom over the last week, this is the way the brackets are always made. You are rewarded for your resume,
not how good you are.
For example, UMass is one of the five or six worst teams in as an at-large bid, but they earned their 6 seed (23rd in RPI, 28th in Sagarin PURE_ELO). And Utah was better than more than a dozen at-large teams, yet they in no way deserved an at-large bid (59th in Sagarin PURE_ELO, 80th in RPI).
Now, what about whether RPI or Sagarin PURE_ELO is more accurate? As always, those two metrics are pretty close. The Sagarin PURE_ELO is a much more accurate measure, but the Selection Committee itself uses the RPI, because they are apparently clueless to the fact that it's a horrible metric that is 20 years out-of-date and easily gamed."