Inevitably any discussion on this topic diverges and goes off at slight tangents, but I'll just give my four-penneth on the original point behind the post. Who, amongst Grand Tour and monument contenders, can we trust?
Cadel
Evans - because other pros have backed him in this regard, he worked with Aldo Sassi and he was only ever a follower, until doping became less effective and widespread. None of his performances have ever been "extraordinary" or surprising.
Ivan Basso - might be a bit controversial this one, but since coming back from the ban:- he took two seasons to get back to the top, again worked with Sassi, was completely unable to recover from the Giro for the Tour last year which anyone "preparing" surely would have done.
Bradley Wiggins - Worked within the no drugs culture of British Cycling, Garmin and Sky, posted his full blood results after 4th in the Tour.
Christian VandeVelde/Ryder Hesjedal - More podium chances than contenders, but the whole ethos of Garmin is no-needles and VdV posted his results after his Tour top ten.
Mark Cavendish - Comes from British Cycling, goes far too badly on hills to suggest any sort of blood manipulation. Known to get his speed more from aerodynamic advantage than raw power (which is documentated as lower than Greipel, Petacchi etc).
Damiano Cunego - Has taken a stand against doping in the past. Is way too rubbish at Grand Tours for someone with his talent to be doping.
Carlos Sastre - Mostly for the same reasons as Cadel.
Thor Hushovd - Another Garmin rider. Done nothing to suggest he dopes.
There are some others that I'm unsure about, who have avoided scandal so far and were it any other sport I might give the benefit of the doubt to (Nibali, Menchov, Gilbert, Nuyens, Van den Broeck, Gesink). The Schlecks (how Frank persuaded the authorities that he paid a Spanish gynaecologist for cycling training plans is beyond me) and Contador do not fall into this category.
I also don't believe in Cancellara (
too strong and he peaks too many times in a season), Boonen (if he takes Cocaine, what else is he taking), Vinokourov, Samuel Sanchez, Joaquin Rodriguez, Oscar Friere, Petacchi, Andreas Kloden, Levi Leipheimer. Some of these for obvious reasons others just for showing extraordinary strength at critical times or being on dodgy teams.
I think that's it for the real contenders.