In a global temperature update through 2012, James Hansen and his colleagues at NASA's Goddard Institute for Space Studies report:
The 5-year running mean of global temperature has been flat for the past decade (emphasis added). It should be noted that the "standstill" temperature is at a much higher level than existed at any year in the prior decade except for the single year 1998, which had the strongest El Nino of the century. However, the standstill has led to a widespread assertion that "global warming has stopped".
Source: Reason. Read full article. (link)