Are you aware of any CREDIBLE sites which have come to the same conclusion as this blog article?

You might want to consider that the Intergovernmental Panel on Climate Change is the best source of climate information, since it represents the best work of 1000's of climate scientists from 100's of countries and academies. Check out link at bottom, page 136, of the graph showing radiative forcing factors and their variables. RealClimate.org references the IPCC.