I think the persona he puts out there in public is the same one he brought into interviews.
If you are a coach/gm and this is how the conversation opens...
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You are not talking to a dude who won the Heisman or a guy who put up monster stats on a title winner... maybe that level of brash confidence could seem charming, but coming from a dude who accomplished nothing and lost every big game he played in, it is bonkers. "I expect to BE the franchise from day 1"...
Again, a lot of these guys talk this way in public (but very rarely in college), to pump up their brand, but I think they understand how things work in the real world and have a different approach when it comes to their professional lives and the people they actually work with.