Tilo Reber writes in comments:
Using the May data, I now get no temperature change for the last 11 years for HadCrut3, RSS, and UAH.
Click for a larger image
Even with the warm spike 1998 El Nino year included, the flatness of the 3 metrics used to track global temperature is telling especially when compared to the Keeling CO2 curve for the same 11 year period:
Here is the entire CO2 record:
It seems that at least for the most recent 11 years, increasing CO2 is not tracking with temperature. CO2 has not overwhelmed natural processes during this period.