How long did it take Landry to win a playoff game? How could of a coach was he? It takes awhile to turn a team around when they have a large talent deficit.
I agree that isn't not really about the duration.
My general concern about JG is that I have yet to see any particularly distinguishing characteristics from him.
I <do> understand that every once in a while you have a Bill Belichek or even or a Pete Carroll that initially were not very good coaches and came back after being fired and were better coaches.
Even in those cases Jobberone, those guys had to take their lumps, were held accountable, had to go back and take a hard look at their performance -- what worked, what didn't, etc. They were fired and eventually were better coaches for it.
I'm curious, what in JG do you see at this stage of his career that makes you think he is ready to take the next step?