The Obama people must feel that he didn't do quite as well as they might have wanted to in that context, because that--what they're putting out privately is that McCain may not have been in the cone of silence and may have had some ability to overhear what the questions were to Obama.
Note: "privately." That's because a public accusation of this kind would require at least a little courage to pull off successfully - and it's not like the Obama campaign has enough people who qualify that they can afford to just waste one on an accusation that's this petty. Really, say what you like about the netroots, but at least they have enough guts to go toe-to-toe. They can't fight worth a tinker's dam, of course, but they're not afraid to.
How ironic that they chose for their leader the candidate who won't.