And yes, it DOES say much the same thing as the IPCC
The reason for that is that the IPCC was good science.
The report also draws from the U.S. Climate Change Science Program (CCSP)...
The Climate Change Science Program integrates federal research on climate and global change, as sponsored by thirteen federal agencies and overseen by the Office of Science and Technology Policy, the Council on Environmental Quality, the National Economic Council and the Office of Management and Budget.
http://www.climatescience.gov/about/default.htm
Do you think they are in on the 'conspiracy'?