do you know that over the years, I have calculated pts per team per game from both leagues, and yards per game from both league for an entire season, at least twice, maybe more, and there has been little difference. Don't feel up to doing it again, believe me or not.
I did these calcs between over 10 and about 2 yrs ago. Every time, clf was less than 10% better, rough guess from fading memory.
Take this weeks nfl games so far. One less than 20, one or two less than 30, depending on game in progress, all the rest in 40s, 50s, two 60s and one over 100. A lot better than you seem to insinuate.