P5 schedules:
2010 (last year in MWC) - 2 P5 teams (games 1,3); P5 1-1, Other 6-5
2011 (1st year of Indy) - 4 P5 teams (games 1,2,3 (Utah),7); P5 2-2, Other 8-1
2012 - 5 P5 teams (games 1,3 (Utah),7,8,0); P5 2-3, Other 6-2
2013 - 7 P5 teams (games 1,2,3 (Utah),6,9,11,13); P5 2-5, Other 6-0
2014 - 3 P5 teams (games 2,4,11); P5 3-0, Other 5-5
2015 - 5 P5 teams (games 1,3,4,10,13 (Utah)); P5 1-4, Other 8-0
Regardless, under the metric of 50/50 vs. P5 programs AND no more than 1 loss to other teams, Bronco's only acceptable year was 2011, the first year of indy.