Personal observation. Last year teams were afraid of the deep pass and played five or ten yards off the receivers at the line. This actually gave the receivers time to move and actually get open, even for the deep ball. Last year Georgia did not do that, they jammed the receivers at the line. Everyone hits the receivers at the line, and the refs allow it all the way down the field. Look at the Bama game last year. The receivers were wide open many times, not because they were faster than this year's players but because the way Bama defended.