I think he probably has his initial reads down but has not yet had the opportunity, for one reason or another, to get on the field, in game situations, and learn and apply the mental options available each play. For example, when he sees a cover-2, he goes from a post to an out, or something like that. This is something Brady said is one of the toughest things for a qb and receiver to learn. The qb and wr have to be on the same page and see the same thing at the line or off of the line. I can imagine it being more than a little daunting being out there with a qb the stature of Brady and not wanting to mess up, nevermind with a coach like BB and such a talented team around him. I would assume this could wear on a young, inexperienced player who may be feeling the pressure.