If you look at a short term window throughout history there are always the same handful of schools that stick out in that timeframe.
In those timeframes usually the names of those schools vary. Some are pretty constant but there is movement.
USC, Texas, Florida, UT, Auburn, Michigan, Penn State, FSU, Miami, Oregon, and hopefully ND will all move in and out of that top 6 group he suggests. And there will be your outlier programs that have their occasional runs.
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As for his bball comparison. Upsets are a product of the game itself, not lack talent accumulation. Small rosters leave more talent for other schools but make no mistake, the same schools are getting the best players every year.
10 different programs have won titles in the last 20 years in bball. 6 of then 1 time winners. The other 14 split between 4 programs.