I do get your point and I know this will ruffle feathers...
...but I just love it when people exclude bad seasons like 1999. I also see that you said it was because they didn't play 12 games, but come on. You'd definitely include it if Ferentz went 10-1 that year.
A person can't cherry pick data like that. What makes it worse in this case is where do you stop? Is the rule of thumb that you throw out every head coach's first year? Or do you throw out the first three due to them not having their "own" recruits on the field? What if they go 10-2 their first year but 1-11 their second year? Do we give them a pass?
Like I said I know you qualified it being that there were only 11 games. But you still have to include everything, even if it's an average.
Urban Meyer went 24-2 his first two years at OSU, do we throw those out? Fans would say obviously not, non-fans would say, "Of course he won, it's Ohio State."
How'bout Nick Saban? He went 7-6 his first year, does he get to toss those out?
Dabo Swinney? He coached a partial year his first season but only lost one conference game. Toss those?
I know this is a lot of boring rhetoric but I think you can see what I mean. There are a million different scenarios out there and when it comes to statistics you can't include/exclude based on subjective reasons that no one will agree on. You either win or lose and you have to include all of them. Every head football coach in history has had a first year.