Across the five major conferences, from 1996 through 2013, home teams won 56.5 percent of league games. There were a few ups and downs, but the rate was pretty steady.
Now look at 2014 and 2015, the two most balanced seasons in the 20-year span. Power Five home teams won just 50.8 percent. Their total record: 267-259.
"Wow," said Phil Steele, the college football author who makes a living studying numbers like these. "You would think it would be a bigger factor. I'm surprised."
"Really?" said Nebraska offensive coordinator Danny Langsdorf, when told the numbers. "That shocks me actually."
Nowhere have things shifted more than the Big Ten.
Home teams dominated conference play from 1996-2011, winning 57.9 percent of games. The past four years, Big Ten home teams are 102-105 — 49.3 percent. It's a stunning departure from tradition.