08 nostalgia may be becoming a thing already:
Beijing staged a magnificent Olympics. The organisation was excellent; the venues breathtaking and the anti-doping tests were stricter.
Don't know about the doping, but the organisation was just a case of a smooth fit. You're not going to get a G4S/army omnishambles because you have a giant paramilitary gendarmerie in the form of the PAP already available. All your volunteers come pre-packaged as Communist Party/Youth League members, ready and waiting to be deployed for stewarding/flag waving/litter picking or whatever's good.There were no Zil - sorry, Olympic priority - lanes in Beijing to my knowledge. But if your car has the right party/military numberplate, then you carry a priority lane around with you wherever you go and you would also be the sort of person who had privileged access to the games.
As for the weird sponsor-authoritarianism we're seeing in London, there's no way Beijing would have allowed some corporation to usurp its monopoly on telling people what to do, and no corporation would have assumed anything different. And of course, there would have been no need for the organising committee to demand that people who link to it on the internet say nice things. From Beijing's point of view, the whole London set up could be described as a failed experiment in trying to run things their way.