Here's a tweet from Tim Reynolds(@TimReynolds) that is about as damning as you can get:
"Canes have given up 300 rushing yards four times in last 15 games. That happened four times in 135 games before that." Now, beyond that, just remember this, this comes in an era where most teams throw the ball much more than they run.
LOL. Absolutely priceless. Yeah, it's a damning quote all right, but not the way you mean. I like Tim Reynolds sometimes but this is rank ignorance. He would be laughed out of the room in the circles I frequent, where tendencies are known and not merely guessed to fit the bias of the moment.
Reynolds obviously has no clue that college football and pro football are separate entities and don't necessarily follow the same trends. In college football 2/3 of the teams still run the ball more frequently than they throw it. That's why I prefer college for betting purposes. Some of the old standby NFL betting systems don't work to the same percentage as decades ago but nothing has changed in college. The read option has essentially replaced the triple option but the most successful versions rely on the run. More and more of them are hurrying up to run the ball, like Auburn. I suspect that trend will increase.
Early in the season it's typically closer to 40/60, with maybe 50 or 55 teams passing the ball more than they run it, and the other 70+ running more than 50% of the time. But deeper into the season as the weather worsens the percentage of teams with 50+% passing continues to drop, until it generally includes no more than maybe 45.
http://www.teamrankings.com/college-football/stat/passing-play-pct