Interesting that the 99 tour was chosen by Hamilton though. For me the field that year was very weak, with Ullrich out injured and Pantani suspended after being kicked out of the Giro earlier that year. With Riis not in either the field lacked any real grand tour pedigree. Zulle never really convinced that he could do it in a 3 week race.
Whilst neither Pantani or Ullrich were in good shape in 2000, the fact they were there made the race much tougher, so you'd think he would do it then if anytime.
Of course the saying that he passed lots of tests does ignore the fact that Ullrich never failed an in competition test either, yet was strongly linked with Operacion Puerto and retired when that blew up. Likewise Pantani passed tests during his back to back Giro/Tour win in 98. It seems probable that he was doing then what he failed a test for in 99. It also overlooks the failed test he had in the 99 tour for cortisoid, which was passed off as a treatment for saddle sores and allowed to pass.
Pantani that year was destroying everyone in the 99 Giro, much as Armstrong did in subsequent years, and much as Contador is now. Of course we'd love these things to be natural. We'd love Landis' attack to Morzine to have been pure adrenaline, or the frequent battling of Vino. I fell in love with cycling after seeing Pantani fly up les Deux Alpes in the rain. It was pure theatre. With hindsight it seems almost certainly assisted, but that doesn't take anything away from the spectacle of it for me.