that do revisionist history. Changing the value of a game played and won or lost early in the season, based on what is happening NOW, is just wrong. Players develop, players get hurt, in other words, circumstances change over time. A win over a team that was ranked whatever at the time, should remain just that.
The movies call this The Butterfly Effect. You never know what the outcome of a game early on meant to a team going forward. But, whatever it was, it does not change what that team was, AT THAT TIME. Which is exactly what the KENPOM and NET ratings appear to want to do. That is a wrong way to evaluate.
The SEC in football does the opposite. They want to claim every team has a huge number of wins against ranked teams every year, due to most of their teams starting out with artificially inflated rankings from the preseason. If they operated per the same system as basketball, those early season wins would be severely downgraded, and mean NADA. But hey, they are the SEC, so they get to have their candy and eat it too.
GT beat #10 FSU to start last year. While at the time it seemed like a big upset win, in the end they weren't that good of a team. There should be some looking back at early season games, especially to take significant injuries into account, but not be a major deciding factor.
I would like to see first set of rankings come out after week 6, for football, when you would have your first set of bowl eligible teams. Pollsters might actually have to do some research to see what teams have actually done vs beating up overrated teams from preseason polls based on pure conjecture.
Maybe bball rankings wait to come out after December when the early tournaments are over and most teams are done beating up on the Sisters of the Poor.
The initial NET rankings are computed on Dec 1, when most teams have played 7-8 games. I'm pretty certain it's a bootstrapped process, not fed by any pre-season rankings or AP/Coaches polls. It might include some notion of the previous year's final position. At that point, though, there's about 15 undefeated teams left and about 15 winless teams, which will tend toward to top and bottom respectively and the magic of iterative calculations to come up with ranks happens.
The early NET rankings are pretty volatile, wins and losses can really move a team around. By now, teams have played 25 games or so, and the very good and very bad teams are more obvious and it takes more to move up or down.