I think it's pretty spot on given that he's only evaluating the quality and performance of the top 5 skill position players on their own merits
Our offense performed at a high level because of having a Top 5 QB, a Top 5 OL, and also lots of guys outside the primary skill position players (think Knox, Hawes, Gilliam, Ty Johnson, Shavers) that got lots of snaps and made sizable contributions. In fact, I'm willing to bet that our "6-10" level skill players got more snaps than any other team in the league