I encourage anyone and everyone to do a pubmed search on testosterone/epitestosterone ratios.  The 'science' behind the T/E ratios more than a bit in doubt.  Setting the ratio at 4:1 (or 6:1) as is once was is arbitrary and there are a number of ways to have ratios exceed those limits without doping.  Studying how ratios change over short and long term due to factors like excessive exercise, hydration, dehydration, diet and other factors hasn't really been fully played out. As a diagnostic test, what's happening with the anti-doping police wouldn't come close being approved for any medical procedures.  

I suspect that it's all an effort to show that Landis is heavier than a duck, in large part because they wanted to show that Armstrong was cheating but can't now that he's retired.  I honestly have no idea whether either of them "cheated" but do know that this is not being addressed in such a way that we'll actually know regardless of their "findings."