Tuesday, January 26th 2010, 4:51 PM EST
The actual observation for the mean global temperature trend since 1998 from the Hadley Center (hadcrut3) is a constant value of 0.4 deg C as shown in the above chart.
As the result, the IPCC models have failed to predict the current decade-long global warming pause.
 IPCC 2007 WG1-AR4
 Hadley Center Global Temperature Trend Since 1998
According to IPCC 2007 WG1-AR4, until about 2025, the global warming rate is projected to be 0.2 deg C per decade as shown in the above chart.