I think who does the saying has a lot to do with how sincere it is felt.
A lot of it is interpretive as well; a very intense, driven-to-win character who is said by a known doper to be clean may be harder to believe than a character such as Moncoutié, whose quotes, history and character suggest that he isn't really a very competitive guy and is much more in it for fun. Somebody who doesn't really compete to win and who sets modest, achievable targets is more readily believable than somebody who is very driven, highly-strung and intense. Though he is hardly the most intense character out there, it is for this reason that I'm less inclined to believe Xavier Tondó has always been clean with LA-MSS on his team list than Moncoutié. Look at the team roster of Cofidis now too - much less international than in the days of the controversy.
Besides, the pictures of Moncoutié I used to start this thread were from the last couple of years. Let's not insult each others' intelligence by suggesting, as all too often happens, that doping is a lightswitch, and if you doped once you doped for every single race you ever entered. A rider like Damiano Cunego, at least reputation-wise, shows this to be false (leaving the Mantua investigation to the Mantua investigation thread). Is it not feasible that somebody who could compete only via doping in the 'bad old days' could compete clean at a later date? Or that riders with clear peaks in their season could ride clean at part of the season and dope up for other parts of it?
David Moncoutié's career reinvigoration at the 2008 Vuelta had more to do with his preferring to be away from pressure and being able to use his natural tendency to attack in the mountains. He lucked his way into the Pla de Beret victory by being in the right break when the Contador/Valverde/Antón attack lost impetus, and then hopped off the front to secure the KOM. After that, he recognised that that was something he enjoyed and was within his grasp - the KOM jersey is not hunted by riders as strong as in years gone by, and not especially hard-fought in the Vuelta; the big points available in a handful of stages gave him the opportunity to win it by getting in the break on a handful of select stages. Most of his big mountain wins are from breakaways or in smaller races. Is it not feasible that you could do that clean, even in the mid-90s?
Since the Cofidis logo is enough for people to be against him (though I fail to see why it is irrelevant that it is Moncoutié that I posted, considering I posted him based on his reputation. I wouldn't have posted, say, El Fares or Saramotins, not because I think they dope or are suspicious, but because they don't have the reputation that Moncoutié has), let's hit the reset button then.