Oh good god. It's like a children's crusade in here. Hardly anybody is clean. Both in cycling and in all other pro sports. A few are clean or cleanish. But mostly not the guys at the pointy end of the races. It's the same across all sports and all nationalities, has nothing to do with whether someone is a nice guy or an egotistical a**. Pro sports = doping. It just does.
Contador has performed like this before, 2007,2009,2011 - anybody shocked by AC's performance today must not have been watching cycling very long.
edit-
To me it seems obvious he had to dial back the juice for a little while, but has dialed it back up, either because he knows JB is about to spill all and his career will be over anyway, or more likely - with Cookson in charge, UCI is turning a blind eye to all doping instead of operating by the Pat/Hein rules of using anti-doping to play favorites, taking bribes and basically just match-fixing depending on who gets more "free reign." That's my opinion.