I'm an American. I believe that something is amiss at the Chatenay-whatever lab. The fact that they keep on making mistakes, and that the UCI wants to re-test everything THERE is just odd.
All labs make mistakes. Sorry to break this news, but I've done a fair amount of work with diagnostic medical labs, certified by this, that & the other... and from time to time they make mistakes. Some more than others.
One thing to consider is that Chatenay-Malabry has been subject to enormous scrutiny... so the fact that a lot of its mistakes have been reported does not necessarily mean it makes more mistakes than other labs, just that we hear about them.
Secondly, my impression is that many of the mistakes have been procedural, rather than technical. Ie they leaked info etc etc. Similarly I have the impression that Landis's defense has been that they didn't play fair when they caught him, rather than that the results were wrong and he was innocent.
Following from the above, there is the "devil you know" argument. The Chatanay-Malabry lab may not have a perfect record (and I'd argue that no lab can), but the UCI knows what their protocols are, how they are used, what their false-positive & false negative rates are at different detection thresholds. This is highlighted by the distorted reporting of the Mayo case, where we were first told that the Gent lab had obtained a negative result... when in fact they had an inconclusive result. If a lab doesn't have a suitably high standard, it's more likely to produce inconclusives. This is especially true since dopers, obviously, are trying to avoid detection. So they're going to try to use doses that just sneak under the level that can be called an unequivocal positive.
My personal perspective is that it's stupid to go back and start taking away yellow jerseys from 10 years back. If 80-100% of the field were doping, it doesn't make much sense to just pick off the guy who won. If Armstrong was found to have been doping, it wouldn't make much sense to give some of his jerseys to Ullrich... It's like writing off Jefferson as a president because he kept slaves.
However if you get caught during or shortly after the event, in such blatant circumstances (breaking the field after bonking the previous day), then you are a) bringing the sport into disrepute; b) an idiot.
How many people here really believe Landis didn't dope, rather than having some issue about "fairness" in the way he was caught?