Why is the personnel change after the tour win suspicious? If they were doping during that season it would seem positively odd to cut loose a host of people who must have known all about it and present them with an axe to grind against Sky at a time when whistleblowing is being made easier than ever. I particularly don't get his point about Michael Rogers ("one of the strongest riders") leaving; if he's alleging that Rogers was doping as part of a pattern of doping at Sky then why does Rogers' leaving Sky add weight to that allegation, or if he's saying that Rogers wasn't doping and still managed to be one of the strongest riders it rather undermines the other half of his argument that they are all suspiciously good.
And "doctors with previous for doping" means (unless you're privy to extra information) one doctor previously employed by another team at a time when doping is alleged to have been tolerated by that team. Not proven and not even alleged to have been part of an orchestrated strategy by the team or its doctors.
Wiggins "largely silent" on the Armstrong case? Since the USADA report was released, a few seconds' Googling reveals:
Sky News, 11 Oct 2012
Daily Telegraph, 12 Oct 2012 (not clear whether this is based on the Sky News footage or just that he gave a lot of interviews on the 11th in similar terms)
'Wiggins said he hoped the sport could move on: "It?s pretty damning. There?s a lot of it and I think the evidence is now overwhelming. In a way this brings an end to the investigation which has been going on for quite a few years. Maybe now, as a sport, we can move forward. My main concern is now I?m standing here as the winner of the Tour de France having to now pick up the pieces for other people?s misdemeanours. It is certainly not a one-sided hatchet job, it is pretty damning. It is pretty jaw-dropping the amount of people who have testified against him. I am shocked at the scale of the evidence."'
Guardian, 24 Oct 2012
'Wiggins hit out at the 41-year-old Texan. "I think there is a lot of anger from most people within the sport, it is a sport I love and have always loved," he said. "It is a shame that cycling is being dragged through this again really, not a shame that he has been caught ? when you get older you start to realise Father Christmas doesn't exist and it is the same with Lance. But it is a shame that us riders here now, we are the one picking the pieces up and having to convince people." [...] When asked whether he thought Armstrong admitting to the charge would help the situation, Wiggins said: "I think so, definitely. But he is a stubborn man and I don't think he is ever going to confess, he has too much to lose."'
Guardian, 2 Nov 2012
'Wiggins describes the corrosive legacy of Armstrong, newly stripped of his seven Tour wins because of his endemic, team-wide doping regime. "It wasn't a surprise," Wiggins says of the report that damned the Texan. "The anger is more: I've got to pick up the pieces. He's still a multimillionaire, and he's not here to answer the questions. I can't not answer them because I've got to go and race next year, and I hate talking about it." Armstrong was never his hero. "He was someone I respected and admired. I've met quite a few sportsmen, but I don't think I've met anybody as ? powerful as him." He describes Armstrong as "quite an intimidating person to be around" and someone who exists in a cosseted bubble of entourages and chauffeur-driven cars. "If I'm going to Kilburn, I get on a bus. He'd have a car waiting for him with a bodyguard. He'd go to races on a private jet. I take my kids to school. It's what keeps you normal. I don't want my kids growing up as fucking idiots, d'you know what I mean?"'
GQ magazine, 16 January 2013 (not going to cut-and-paste the whole interview here)