I think people read way too much into this, Sirianni was just giving an example of trying to elucidate details about a player's personality.
As one reporter pointed out, would you prefer he talk in "coach speak?"
Former players can scoff, their career is over and they have their bank accounts.
Young players better take it seriously.
Of course, most of you are too young to remember George Hegamin and the blocking sled.
As long as Sirianni is himself, if he's genuinely one of those guys wired a little higher than most, his players won't be bothered, it's the fake 'rah rah' guys who get tuned out. If he's just an enthusiastic guy who loves football and puts as much energy into little things like proper technique as much as trying to show he's smarter than everyone else, it may well be contagious. Practicing the little things (proper footwork, how to use your hands, etc) is boring, so is coaching these things, but repetition builds muscle memory, and a coach that can get players to buy into working on those things will have a better team.
My theory is with the advent of digital film, editing is so easy that nothing can be hide for more than a game or two in the NFL (and other sports). So the real edge is coaching up talent (building an edge with the same resources) and execution on game day (everyone knew what Lombardi was going to run but that didn't help them stop it). Media love to talk about creative coaches who have brilliant schemes, but any innovation now goes viral in a matter of weeks, not years.