There is significant ambiguity there- many people identify as "global warming skeptics" in that they are skeptical of the moral and political claims of the global warming movement, not that they deny the existence of AGW.

I'm not skeptical of CO2 as a greenhouse gas, or of the increase of atmospheric CO2, or that increasing CO2 levels will generally lead to higher temperatures, or that we have had higher temperatures in the last few decades.

But I am skeptical of the model projections into the future, and even more skeptical of the claims that the accuracy of those models have been established when they've proven inaccurate for the last decade. When you make predictions that fail, you should be decreasing your certainty in the model that gave those predictions.