And as has been said, Pereiro was likely a Losa client. The only names connected to Abarcá in Operación Puerto were Zaballa and Valverde, who were relatively recent acquisitions (Valverde's involvement in Puerto dates back to 2004, when he was with Kelme). They most likely went elsewhere, or were a don't ask don't tell team.
If Óscar Pereiro was a clean rider, then some of his opinions would be very different than the ones he has now.
But the opinions he expressed on this TV show - those of hating the way he gets mocked and derided for being a cyclist while other sports stars get a free pass, of resenting the way doping is covered up and not even talked about in other sports when it dominates discussion in cycling - I don't see why or how those would be any different if Óscar was clean. He'd still be fed up of the mistreatment of his sport compared to others. He wouldn't have gone on Punto Pelota to run down other cyclists. Because that wasn't what he was there for.
A lot of people who seem against Pereiro because he didn't raze the house down, tell them about how he was a doper and which cyclists are at it don't seem to grasp that he had gone onto a football show to talk about football. It was only when one of the hosts made a joke about cyclists and drugs that this started. Pereiro was not there to talk about cycling, and only did so when goaded into it. Punto Pelota is not a show about cycling, and its audience - and hosts - don't give a damn about whether cyclists are doping, other than to laugh at them once in a while. Pereiro was there to talk about football, and that's why he talked of the doping of Zidane, of Guardiola, of Gurpegui, and not the doping of Valverde, Contador or Heras.
If Pereiro wants to come clean, he can do it via much more responsive channels than Punto fricking Pelota. At least credit him with SOME intelligence.