im not sure i agree with this. there are very few true pre-snap reads (meaning look at the coverage pre-snap and know where you are going to throw the ball without making a post-snap read ie.. catch, step and throw to that receiver immediately). i have the entire playbook and there are only a couple of true pre-snap reads that dictate where the ball will be thrown automatically. Now, if you mean that he has a pretty good idea based on alignment and what the D is showing pre-snap, i agree but it almost always requires a post-snap read of the conflicted defender that the play is designed to attack. If its the corner, and the corner stays short, the ball is thrown to the corner route without delay knowing the safety had inside leverage. if the corner goes deep, the throw is to the stick/curl knowing the outside LB had inside leverage and won't be able to get out to the flats that fast. But my point is there are some basic post-snap reads in approx 90% of LT's pass plays. Its not overly complex in what it asks the QB to read after the snap but thats true of any spread offense. He also ad-libs a lot when throws off a scramble.