Something to consider when looking at this year's stats:
Just a couple or so years ago, teams would regularly have 300+ yards passing/game. An exceptional day might be close 400 yards. Average teams would be around 250 yards.
Teams that had a good rushing attack would be around 75-80 yards/game.
Exceptional teams would be just over 100 yards; average teams were around 55-60 yards/game.
The trend over the last couple of years is the opposite.
Today, good teams are around 250 yards passing, exceptional is 300+.
Rushing is around 110-120 yards/game for the better teams, and average teams are around 100-110 yards.
In spite of it being a "passing league", the tendency is teams are running more. Or everybody is getting a lot better at it....