There was really no indication coming out of college on what has become Patrick Mahomes' strength (aside from his huge arm): Reading and recognizing defenses both before the snap and during an actual play and adjusting on the fly.
Many but not all of the "I told you so" people were not seeing that from Mahomes in college, no matter what they say now. Because he really didn't do that in college.
Some guys just have the brain and natural know-how to quickly mentally and intellectually adjust to such things and to pick up quickly how to process and adjust to defenses on the fly. It's really not something that showed up much in the Texas Tech tapes, but then again, it wouldn't.
There was every indication that he'd be a project Jay Cutler-lite type----huge arm gunslinger who had success in college and is not lacking in confidence. His footwork was (and continues to be often times) atrocious. Pre-Snap Reads had a really good analysis of him (and all the other quarterbacks) before the 2017 NFL Draft.
After the first few games, I thought, "Damn, this guy ended up at just the right location with just the right coach and just the right talent around him. He wouldn't be having huge success just about anywhere else." After a couple more games now, though, and really looking at each of his plays, this dude's got it. He's the real deal. And I too was wrong---He has the brain and the eye-to-mind quick recognition to become a quick study and adjust on the fly, to the detriment of whatever defense he's playing against. If Andy Reid saw that somehow prior to the draft, good on him. He's obviously a bigger QB guru than anyone here.
The things we're waiting on with Trubisky---staying calm in the pocket, reading defenses pre-snap and during a play and adjusting, recognizing defensive setups and reacting accordingly, going through multiple progressions and recognizing who's open and who's *going to be* open----Mahomes already does those things. Doesn't mean Trubisky can't learn and get better at those things...but some guys just have it. Mahomes has it.