I must be way, way behind the times, because when I saw Flor’s post saying that Bert is a doper, I was certain that someone must have hacked into her account. And she’s now a Froome fan? When did this sea change in the world order occur? And what instigated it? Flor, are you just a fair weather fan?
In any case, I think it’s premature to say that Contador is finished as a rider capable of winning GTs. There seems to be a long-standing myth that he has always been a dominant rider, and therefore if he isn’t dominating now, he must be declining and/or doping less. It’s true that he used to win just about any and every stage race that he ever entered, so in comparison to that, his form does look poorer now. But his record in GTs is very uneven. Of the seven GTs he originally won (including the two he later lost when he was sanctioned), in only two of them was he clearly the best rider: the 2009 TDF and the 2011 Giro. Three of the other five were won by less than a minute, making them among the closest GTs in history (has any other rider in history won three GT’s by less than a minute?). He won the other two, the 2008 Giro and 2012 Vuelta, without winning a single stage, which is also quite unusual (has any other rider in history won two GTs in that manner?). The 2008 Giro was almost dead-even till the final ITT; in the Vuelta, it took an escape on a late mountain stage to get him the victory. That Vuelta, his first GT coming back from the sanction, is now part of the evidence people are using to argue that he is not as good as he was prior to the sanction. But his performance there, when he probably wasn't 100% after the long racing layoff, was no worse than in some other GTs. As Ferm notes, he didn’t look so hot in the 2010 TDF, when he should have been at the peak of his career.
So I wouldn’t count out Contador just yet. The record shows that he quite frequently is not the strongest rider in the race, and yet is still able to win. Like a pitcher who can still get batters out when he loses his fastball, he is dangerous even if he isn’t the best climber or the best TTer.
And I think it's too early to say that his recent performance is the best he's now capable of. Many multiple GT winners, e.g., Hinault and Fignon, had poor years mixed in with great years; just because Contador looked unbeatable back in the 2001 Giro doesn't mean that he would always be capable of riding at that level, and that therefore we have to look for some explanation. He certainly is not at the age where one would expect to see a natural decline. It could be that he's doping less--most riders do worse after they come back from sanctions--but I’ve never been a fan of these claims that one rider or one team has a much better doping program than another. Unless Contador is so terrified of the possibility of getting busted again that he's off everything, I would be very surprised to learn that other riders have a significant doping advantage over him.