Just noticing a perceived difference between Tannehill & some of the elite QB's in the NFL is that most of them, (e.g. Marino, Brady, Brees, Manning, Romo, Roethlisber, etc.) pump fake often and Tannehill doesn't seem to pump fake AT ALL (at least I can't recall ever seeing him do it, maybe he does.)
The point is, that even as a high school QB you are usually taught to either get the ball out quick to your first read if he's open or pump fake to him if he's covered then move to your second read. This usually give that split second hesitation to create a bigger throwing lane/window to hit the 2nd or 3rd WR & is designed to move the safety in the wrong direction. That can make all the difference.
As stated, I don't recall Tannehill pump faking much if at all. Can't tell if it's because he's a bit scared or never been taught to do it. Most of the elite QB's are so comfortable in what they are doing, that is seems they have the extra time to pump fake.
Also, it might cut down on the number of batted balls as well as buy him extra time if D-Linemen are jumping, they aren't rushing.
Keep me honest here. Is this a teachable skill or do some QB's "Got It" & some don't?