People on here need to remember Froome signed up for this tour to support Wiggins, so why would we expect anymore? The plan was always going to be for Wiggins to make time over the time trials and for the excellently chosen and well paid (by comparison to other riders) team to support him on the mountains. Wiggins has managed to follow their wheel, unlike Evans who sadly struggled to keep up with Teejay today.
I'm sure Froome will be a team leader and GC contender next year, whether at Team Sky or elsewhere. By the way, what a race in the mountains 2013 could be with the Schleck's, Contador (if clean), Froome, Evans, Nibali and Wiggins!