Yeah, lists like that are always interesting. You get a general sense of the quality of a team across the whole season regardless of the postseason and accounting for strength of division/schedule, close games, etc. For example they have the '79 Rams as only the 16th best team in the league that year. They went on that late-season run to the Super Bowl but...maybe not far off. And the Bucs, who they beat in the NFC title game, here are only 20th.
Then you have the '88 Rams- ranked 3rd in the league here- who lost the wildcard game at (#1 overall) Minnesota.
This also reinforces something I've thought about the 2012 and 2013 Rams which is, while they went 7-8-1 and 7-9, those were pretty solid teams. 16th in 2012 (with SF and SEA both top 3) and 12th in 2013 (SF and SEA top 3 again). Also 13th in 2015 when ARZ and SEA were 1-2. Not to open old wounds but Fisher did not do a bad job overall his first 4 years in STL...