the article had little that was lascivious, or even purported to be so. The 'crime' that McCain was accused of was that of having a tin ear when it comes to judging how his behavior looks from an ethical perspective.
I think that's an accusation that has some weight. And McCain's reaction confirmed that weight. For a crusader against special interests to defend himself with "everything I did was legal," or "I have many friends who are lobbyists," or some variation of "Hey, that's the way business is done in Washington." belies a sense of the necessity of aligning appearance with intention.
The Times said that McCain's view of himself as a moral man gets in the way of his behaving in a way that others would expect a moral man to behave.
I don't think that's either slanderous or premature.