You need to look at the talent level differences between his Kansas and Buffalo teams versus these top 30 defenses. My sense is those teams and specifically his offenses were over matched many times vs a top 30 defense You would hope his teams at Kansas and Buffalo at least a few times could out perform what their ranking and talent level was but I guess not. Some of his Kansas teams were pretty good so maybe the talent level was close to top 30, that is a hard thing to measure. I don't think Kansas nor Buffalo were recruiting top 30 classes but you would need to analyze each of the opponents.
The main point now that he is at Penn State with an elite talent level on offense is the same point we harp on with Franklin. When faced with equal or slightly better (not significantly better) talent can a coach K offense put up points and win? Looking at last season, vs Oregon we did well but not sure how highly ranked the Oregon defense was. He failed miserably vs Ohio State but you do wonder if Wallace makes that catch could things be different. The goal line series of plays was horrible. Finally vs ND I thought the offense was pretty good. You can't blame Coach K for the terrible execution between Allar and Singleton at the goal line. We get 6 there and we score 28 versus a very good ND defense. Not sure how much responsibility Coach K needs to take for the final pick.
My take is yes there should be valid concern if Coach K can come up with an innovative game plan to beat an elite defense. However, he has had some success but it has not been consistent.
Without getting too deep, it does have to be normalized.
Here is the relevant "Cliff's Notes"
On average, "not top 30" defenses give up around 26 points per game.
On average, Top 30 defenses give up around 20 points per game.
One would expect that a given offense would either score less than 20 against top defenses, AND less than 26 against average defenses.
Or more than 20, AND more than 26.... depending on how good their offense is.
Kotelnicki offenses have averaged around 32 against "not top 30" defenses (well over what would be expected given the quality of opposition), and around 17 against top 30 defenses (well below what would be expected given the quality of opposition)..... some folks won't understand that, and that's OK.
But what that means is you have performance that is very good - ALL things considered - against mediocre, but poor performance- ALL things considered - against quality. (Really, very similar to CJF PSU teams' W/L performance against good vs mediocre teams).
And that any offense, on average, would score roughly 6-7 ppg less against quality (top 30) teams.
Kotelnicki teams have scored 15 MORE against mediocre - or 15 LESS against quality (depending on how you want to look at it). A rather large and out of line disparity over 110 or so total games.
It is what it is.
So far, the same has played out at PSU for Kotelnicki (though it is a small sample size at PSU thus far)