Years of data and mountains of evidence say Brady IS delusional if he thinks he is going to play at an MVP level for 6 or 7 years. No one has ever done it or even come close. 2-3 more years is all even the most optimistic should reasonably expect and even that can be argued as extreme.
However, I keep coming back to that Peter king interview where less then a week after being pummeled in the super bowl with what 5 sacks and 20 big hits? He was walking without a limp and going skiing. No one has focused his diet and excersise the way Brady has. No one has the passion for fitness (his true passion in life, not football IMO) and every single year Brady continues to play at that MVP level is the greatest advertising for his lifestyle possible. It's more then just the diet though it's the kind of program he is on focusing on flexibility over muscle mass. It is a 180 degree shift from conventional thinking that someone like Gronk is peddling. The most astounding thing about it to me is that his base numbers (40 time, 3 cone etc) are getting BETTER. That is beyond unheard of its borderline unnatural.
The other absolutely key thing I got from that interview and I believe Brady, it wasn't just him saying it to sound good, is that he feels better now at 39 then he did at 29. He said that he used to get dinged up and hurt all the time, he used to feel like crap and worked his way thru it. Now he knows exactly how to feel better and survive the equivalent of 20 car crashes and it's hard for him to get hurt. That chancellor hit proves it's still possible and I agree with those who are concerned about the hit that does end Brady's career but I think the odds of it are no higher then any other football players.
I have watched Brady closely looking for that throw where he puts his whole body into it and it still doesn't quite get there. Still throwing lasers with a wrist flick. I have looked for that hit where he gets up slow like that hurt more then it used to. Bounces up jawing. Have there been sacks he took that before he could have avoided with pocket movement? Oh wait this year people had to account for him running like he was Russell Wilson...ok that might be a bit of a stretch but he was a legit threat to run if everyone was covered. Everything bad about Brady's play this year was IMO just the normal bad plays every QB has from time to time and far less of them then most QB's.
I guess to sum up my position is until I see some actual decline in Brady's play I would not bet against him because while his goals are delusional no one has trained like he has, no one has focused on the goal of playing late into their 40's like he has, and what he is doing to achieve that IS different. Will it work? Who the hell knows but if anyone can it's Brady and I would ride him until he can't anymore.