In theory Contador is also not at 100% top form. I think this "lack of form" issue is thus moot. Both riders were derailed from their initial big objective, both have demonstrated extraordinary ability to bounce back from adversity.
Froome is arguing with last year's Tour in mind as his barometer for "top form," but it has to be remembered that that was against an abysmal AC. Well today he's up against a rather different Alberto. Whereas the gap he gave Rodriquez and co., is relative to the margin he gave him on some MTFs last Tour.
This Vuelta isn't over, but it certainly bodes well for the Tour 2015.