I could buy that if Heupel didn't bench him at the start of the season for the QB he brought in. Or if Hooker was slow coming in off the bench or got better over the next few games. But it was very obvious as soon as Hooker hit the field that he was a lot better than Heupel first choice at QB.
More likely that he just inherited a seasoned QB that was finally coming into his own. Next year, or this year if Hooker gets hurt, will settle it.
Sounds like a good story, except it ignores the massive jump in stats when Hooker started playing for Huepel.
I would be tempted to ignore that too, but like to think I could own up to a faulty opinion in the face of contradicting facts.