"Better than all the rest."
Hypothetical scenario: If a doping control system was so effective 100% of riders were racing clean during the 7 times Lance won the Tour de France, would he still have won? Given that he had the best team, equipment, and support? It is obvious he can win against the best riders that dope.
I liken it to a performance car race where turbos are restricted, but an overwhelming majority of clever racers contrive a way to develop small turbos undetectable by race organization. One rider wins successively.
Are the turbos (or dope) the game changer, or the constant?