For the record, I have seen the television replay from every angle at every speed. It is obvious that Brady himself wanted to pull back his attempted pass, and the ball dropped because of it. In my "opinion" it seems like a fumble. But the Official NFL Rule Book clearly states that if the arm is moving forward (on purpose) and the ball is dropped or otherwise freed from possesion "before being TUCKED away", then it is ruled an incomplete pass. The problem is the word "tucked". It is not defined. And based on that rule the officials made the proper call. By the book.