Wow. Today's confirmation that Landis' A sample tested positive for elevated testosterone:epitestosterone (T:E) caught me by surprise. I was impressed with how Landis came back in stage 17 of this year's Tour de France--ultimately winning the GC--but now the inevitable questions arise.
I hope the B sample turns out negative, but according to this article Landis himself is not optimistic despite his denial of performance enhancing drug use. One option appears to be using an endocrine test to show that Landis just has a naturally high T:E. I'm not sure how that works, though--if this is the case, wouldn't a high T:E have shown up previously? This can't be the first time Landis has been tested.