Sure there was tangible proof we would win 7 games last year.
We were basically assured of beating Northwestern (train wreck at beginning of year), Temple, Virginia Tech, Wagner, Michigan State (train wreck) and Indiana. Rutgers did that. The bowl game was not a gimme, but let's take a look at that game and why Rutgers won.
QB play? Not really. 7/15 for 84 yards and 0 TDs. GW rushing - 9 carries, 9 yards. Two tush push TDs that could have been handled by any QB or handed to a RB. Why did Rutgers win the game? Monangai, carried for 163 yards and a TD.
Let's take a look at the QBR for GW and AK against the same opponents last year:
WIS GW-20.3 AK 53.5
OSU GW-23.9 AK 51.7
MSU GW-22.3 AK 66.9
IOWA GW-29.0 AK 45.9
MICH GW 84.5 AK 7.4
NWU GW 88.9 AK 90.9
In every game except the MIchigan game, AK's QBR was nearly double GW's. That is against some of the toughest teams in the B1G- Wisconsin, OSU, Iowa, and Michigan. In every single game except one, AK had a better QBR.