Flutterby™! : Doping tests in sport

I'm not sure what I can add to the entry over at Educated Guesswork titled Natural resistance to testosterone testing, but I'll try. It links to New York Times: Some Athletes' Genes Help Outwit Doping Test, which reports on a study about detecting testosterone doping in 55 men:

The results were unambiguous: the test worked for most of the men, showing that they had taken the drug. But 17 of the men tested negative. Their urine seemed fine, with no excess testosterone even though the men clearly had taken the drug.

I quibble with the "unambiguous" label, especially since The Economist version of the story points out that:

The result was remarkable. Nearly half of the men who carried no functional copies of UGT2B17 would have gone undetected in the standard doping test. By contrast, 14% of those with two functional copies of the gene were over the detection threshold before they had even received an injection. The researchers estimate this would give a false-positive testing rate of 9% in a random population of young men.

I'm not sure what I can add, except that it sure seems like the whole anti "performance enhancing drugs" scene is really about limiting athletic competition to genetic predisposition, and this seems like it's taking that to extremes...