Do you realize that IPCC goat a warming rate of about 0.2 deg C per decade for the period 1970-2000 because it did not remove the warming rate due to ocean cycles shown here? => http://bit.ly/HRvReF
When you remove the cyclic component, what you are left is a uniform warming shown by the read line. There is no acceleration in the warming rate after mid 20th century compared to before it.
How sad that the scientific community of the 20th century could not pick up such a major flow.