Macroadie said it better than I ever could, and that is my position. Mac I don't think your post is unsubstantiated at all if one employs logic, though he may want to re-examine his take since we agree.
My only problem with his take is the "all Grand Tours" analogy, which is not the case (especially the Giro). My take on that would be that LA didn't ride those tours thus they weren't showcased and a cash cow. I would bet, though we have no way of telling, if LA consistently rode those other tours things would have been quieter in them. Of course we will never know.
The examples you point out RR were pre LA reign with Pantani, and Ullrich was caught OOC. So, they don't really apply to my POV which is there was a blanket of cover shown by all the top riders in the TdF during 99-2005 for the reasons Mac wrote. I do not know how many others had tests thrown out...I just look at facts and the fact is nobody of any "value" got tossed in the TdF during those years. Nobody.
What FL says I am sure has merit, but FL was not on other teams so is unaware of the blatancy of others on their team busses or in private. TH said the peloton in a whole shared info to mass avoid detection. How blatant can somebody be in an atmosphere like that?
Now, since you think LA was the only one that had advanced notice, special treatment, etc. then which one of the following do you prescribe to?
1) The others were clean in the tour
2) The others were lucky not to get caught at the tour, contrary to other top contenders in other GTs.
It's either one of those, RR.