re: According to EA, LSU is a tier 1 school

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apparently there was a uniform metric for determining the tiers based on AP top 25 finishes over the last 10 years so I’m sure if you look at the final polls over the last 10 years it’d make more sense.

Definitely explains Iowa.

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yeah, they basically always hover around #15 or so.

those other big name teams in the lower tier have all had seasons where the bottom fell out and tanked their rankings.
Iowa never seems to fall off a cliff. They're just always somewhere between 8-4 or 10-2.