Given a longer TT he probably would have won the whole thing, that was always Wiggins' thing, stay up there with the leaders and get time on the time trials.
The 2012 TDF had 2 40-50KM TTs and Wiggins won them both, the yellow jersey was held by 2 people in that tour, Fab and Wiggo. which tells you a bit about whom that tour suited. Wiggo also had Froome etc setting the tempo up hills to prevent attacks, Froome could probably have won but that wasn't Team Sky's plan.
I bet Froome was told not to try on the TT's in 2012. Wiggins took 1'16" over Froome who was second in the last TT.