People focus too much on the ranking and not enough on the number that actually makes up the ranking for Kenpom (AdjEM). NET functions the same way, we just can't see the actual calculation.
8 thru 12 here have basically been hovering around the +24 mark in AdjEM for a while now. We were favored by 19 points in Kenpom's model yesterday and only won by 7. That will hurt that Adjusted Efficiency Margin number. Alabama *only* dropped to 7, but before yesterday, they were above Tennessee and up in that +27 range. That loss dropped them all the way down to +25 and closer to the group ISU has been in. That's a big drop.
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It isn't that complicated. Win by more than you're expected (or lose by less than you're expected), your AdjEM improves, win by less than you're expected (or get blown out), your AdjEM declines.
NET functions the same way; it has nothing to do with metrics loving offense more than defense or quad victories. The quads come from the NET, the NET doesn't come from the quads.