This is an awfully naive analysis in my opinion. Hincapie, of all people, has no basis to be bitter against Lance (I'd argue that Tyler doesn't either) - to the contrary, he is likely the person who'd be most harmed by confirmation of USPS's doping, other than Lance himself. Meanwhile, virtually every rider who shared the TdF podium with Lance has been found to be a doper. It seems essentially inconceivable that he could have been dominant in that environment without doping himself.
The fact that Lance supposedly never tested positive (actually Tyler claims he did, in the 2001 Tour de Suisse - this was the big revelation on 60 Minutes) doesn't mean he never doped - Tyler himself only tested positive once, and Marion Jones NEVER tested positive but ended up going to prison for perjury for lying about her doping. Moreover, Emma O'Reilly (who, again, seems to have no reason to defame Lance) claims the cortisone prescription he produced to get that positive test excused was forged AFTER he tested positive.