In 2013 the team scored 27.8/game and 66th in the country. However in 2014, BYU scored 34.8/game and 23rd in the nation in scoring. The final year, we scored 30.7/game and 49th in the country. Those numbers aren't that much different than other BYU offenses. And are probably explained by tougher competition and / or poorer players.
Here is what BYU scored in Taysom's first year:
Virginia 16
Texas Longhorns 40
Utah Utes 13
Middle Tennessee Blue Raiders 37
Utah State Aggies 31
Georgia Tech Yellow Jackets 38
Houston Cougars 47
Boise State Broncos 37
Wisconsin Badgers 17
Idaho State Bengals 59
Notre Dame Fighting Irish 13
Nevada Wolf Pack 28
Washington Huskies 16
They put up some points. 40 against Texas, 47 against Houston, 37 against Boise St.