I can see how the argument can be made that Tate had the best spring game out of the QB's. That is a legitimate/valid argument. He had a great showing; I may argue that he had the best showing. On the other hand, saying that he was "by far" the best qb or for the ones that are saying that he "separated" himself from the other QB's, that point is laughable.
Again, not one of the QB's separated themselves this spring. William's looked the most natural at the position, Kosi was the most consistent throughout the entire spring, including the scrimmages, and Martell had a good last 2 practices and a great spring game.
Like the coaches have stated, this battle is far from over and will carry on throught the entire summer/early fall.