Reading this morning's papers with commentary from World Anti-Doping Officials, endocrinologists etc, I'd have to say you are overly pessimistic, RichardW. Commish is right. This test is by no means definitive according to lots of people in this business. Lots of false positives. Commish - we need a thread posting a roundup of articles with the experts weighing in. I've got a lot of articles/quotes this am after a half-hour of reading. Can you start us a new thread where people can post what experts are saying today?
Reading through a bunch of authoritative references to the testosterone/epitestosterone ratio test I found that the International Olympic Committee has replaced the most common testing method with one using mass-spectrometry technology. This newer test allows them (the IOC) to differentiate between human testosterone and exogenitic testosterone.
So, in answer to your question, the test has been found faulty and abandoned by the IOC, and that mostly due to frequent false-positives.
Remember, this is just a ratio test. Turned out Landis does not have a higher than normal testosterone level. Instead, he has a lower than normal epitestosterone level, and that may indicate something else. What it might be we do not know.