This is an interesting topic. I would be curious to see their methodology on this. On the surface, it definitely rings alarm bells when 2 Namibian teens are running in the Olympic final at 200m and setting other Continental records in other distances. It is hard for me to reach the conclusion that the extra Testosterone is not contributing majorly to that. Of course, is that genetic advantage any different than being born with the physique of Athing Mu or Allyson Felix?I think the studies that have been done about the impact of endogenous high T haven't really supported the IAAF ruling AFAIK. Little doubt adding T helps, but more doubt if high natural levels really helps (considering there are olympic male athletes under the barrier athletics have put in place).