SeriousSam said:
I'd love to know.
I can't help but think he must be using better stuff than the other dopers, or more of it. If not, he really has a tremendous natural talent that somehow never manifested itself until 2011.
I don't think it's as simple as the binary equation "More/better Dope or Natural Talent". There are other potential (and IMO more likely) factors that we know about already, which could apply in the case of Froome:
1) Uneven response to drugs. It is widely known that people respond differently to drugs. On some it has a huge effect, on others not as much. This is the case with everyday over-the-counter and prescription drugs as much as it is with PED's.
2) Different baselines. An athlete using blood manipulation who is naturally at a lower level gets more overall benefit than one who starts at a very high level. This could be exacerbated by the blood passport, which tends to cap levels. If I start at 38%, I get tremendous benefit by upping to 50%. If I start at 44%, much less so.
3) Protection by the organization. We know this has happened in the past. I think it's not a stretch to imagine that the UCI protected Sky in the lead up to the 2012 TdF and Olympics. Certainly an easy case to make that they were incentivized to protect Sky, though there is no evidence for this that I know of. It could follow that protection still exists, giving some dopers more leeway than others. We saw this with Armstrong, and it was tied to revenue models. The same financial situation existed/exists with Sky.
In my view these are all possible explanations for certain riders can see greater leaps in form than others. The fact that Froome was an average rider before his transformation would fit in well with 1 and 2.