I don't care much for Victor Conte, but it's hard to imagine there's anyone on the planet who knows more about this subject?
Nothing new regarding testosterone (see Landis, Floyd). Just like anything else, atheletes (or horse trainers) are going to push the envelope. Most are smart enough to stay below the testing limits. Some, make mistakes or are dumb enough to get caught.
Anyone who believes most atheletes are clean, aren't taking every advantage and pushing the testing envelope, are naive.