Just answering the OP straight up...
Yeah.
But I'm also not one of those fans who think there is any head coach ever who, on his own, is so great that he's able to be the difference between Super Bowl and just good enough.
Rather, I think there are a pool of guys who have the capacity to coach a team to a Super Bowl, and you're either in that pool or you're not.
As long as McC continues to have the fire, the motivation, I'm confident he has the mind and experience that's going to qualify him.
But. The bigger issue is what is always the bigger issue. Do you have the talent inventory?