This response (and Chris E's below) raise interesting points for thought... RR, I think that our naive friend was referring to the race today when he said 'there's no evidence that he was anything other than clean'. You are referring to Fassa Bartolo, which he has not been on for what, six years now? And Cecchini was, I think, at least 4-5, right? So, what is the assumption you're running under, 'because there's definite anecdotal evidence that he was involved in doping many years ago, I will assume he is now until proven otherwise'?
The only reason I can think that anyone would have to not assume that is if there had been a change in the way the peloton thinks about doping, through either fear of being caught and the negative publicity associated with it, or whatever. Obviously, many people don't believe that's happened. I don't really either, but I don't feel like I know enough to go tossing my opinions around.
How can we ever tell as viewers if there is less doping going on?