No contradiction. I think Froome had bilharzia, but I don't believe that the amount of talent he showed prior to the disease messing things up for him was enough to justify the enormous strides that he made, and also am suspicious of the timing of this huge jump (just before contract negotiations) followed by another down period. I therefore think that the improvement of Froome in August 2011 is more than can just be explained by "ill Froome/healthy Froome" just as Cobo's history of depression and struggles to fit in at Caisse d'Epargne mean that the difference between Cobo 2009 and 2010 is more than just "clean Cobo/dirty Cobo".
Also, I picked Martin not because he's supposedly clean (though he is) but because he just won one of the biggest races in the sport this weekend, so he's fresh in the memory. Martin won the Froome breakout stage to La Covatilla, in fact. I thought Froome was credible then, I thought he was a mountain domestique who buried himself for his leader and did an awesome job, and would probably be burning himself out in the first two weeks for the far more proven Löfkvist to take over in week 3 as Wiggins' domestique of choice. I even advocated that he soft pedal the ITT to be fresher for Wiggins, which shows you just how much I underestimated his ITT capabilities (he beat Cancellara the next day). Martin? He behaved like a typical climber, and lost much time, and thus there was no overperformance to raise an eyebrow at.
There have been guys who've come out of nowhere like Froome did... most of those fairytales ended the same way. And there have been guys who've conquered all before them like Froome does, or at least would if the team would let him... most of those stories ended the same way too. In the context of these, seeing a guy who was once a moderately promising youngster (but not as promising as, say, John-Lee Augustyn, who was younger and on the same team) suddenly turn into a guy who outclimbs Contador and out-TTs Cancellara. Are you seriously telling me you didn't wince slightly at that?