JAMES TARANTO: The Gray Lady’s True Colors: The proof of the pudding is in the tweeting. “For those lacking basic Twitteracy, ‘RT’ is short for ‘retweet,’ which means that Roberts was repeating a tweet from the account of ThinkProgress, a highly partisan left-liberal opinion site. This would be unremarkable coming from, say, the editor of the Times editorial page. From Roberts, however, it reinforces perceptions that the Times’s news coverage is biased in favor of the left and against the Tea Party. . . . One imagines that Roberts doesn’t mean to be partisan–that he thinks TP is making an interesting, salient point whose merits are obvious to all right-thinking people. Which, of course, would be entirely consistent with what we suspected about the Times back in January.”