Floyd and Bernard Kohl, among others, have already explained how riders beat the passport, so that drop from 11% to 2-3% almost certainly reflects at least in part better doping. Also, one of the most significant things Ashenden says in that article liniked in another thread, which rarely gets notice, is that the passport does not catch blood doping very well. As FL said, it's easy to balance a transfusion with a little EPO so that your hemo-parameters don't change. If the passport worked anywhere near as well as these apologists imply, there wouldn't have been such urgency to develop alternatives like the DEHP test--which can also be beaten.
Meanwhile, the LG lawsuit against Torri is one of the funniest things I've come across in cycling:
Zani told Gazzetta dello Sport that Liquigas will sue Torri for five million Euro because his comments have damaged the success of Ivan Basso at the Giro d'Italia and Vincenzo Nibali's victory at the Vuelta a Espana.
Remind me, how much money did Ivan pay to the guys who finished behind him in 2006 Giro, because he "damaged their success"?