I'd say 50/50 reliable thus not reliable at all. They also write a lot of bull****. I'm not doubting that they have an insider at Astana that told them this story, I'm doubting if their source is being honest here. And being a historian after all, source means everything.
Just doesn't make sense to use Clen to lose weight. There are a lot of better products to use to have the same effect that aren't easily detectable and can be masked.
And if Contador really did do a blood transfusion(which is something I don't doubt at all from anyone who commonly places in the top 5 of GTs) then why did he drain blood BETWEEN the DL and the Tour where he also TOOK CLEN(according to this insider)? That just doesn't make sense at all.
And if they want to use that plasticicer test in Court then they have to test every GT contender during the Tour for it. Unless they're afraid of the results. I bet Andy wished he didn't win the Tourmalet stage then