Reinhart and Rogoff take on the claim by "famous economists associated with the Romney campaign" that the economy is recovering slower than we should expect. In fact, when the data are examined honestly, " the economy’s performance is better than expected." Here's the introductory summary and a link to the article explaining this in detail:
This time is different, again? The US five years after the onset of subprime, by Carmen M Reinhart, Kenneth Rogoff: The strength of the US recovery has become a political issue in the presidential election. The US is doing better than other advanced economies, but famous economists associated with the Romney campaign claim this is not good enough. The US, they argue, is different. Here, the masters of the 'this time is different' research genre – Carmen Reinhart and Ken Rogoff – argue that US historical performance is not different when it is properly measured, so the economy’s performance is better than expected.