It shouldn't be surprising. There is no agenda in Science other than discovering factual truths.
EDIT:
My two cents:
Reading this article I feel that they are referring to the short term effects of global warming that had been exaggerated years ago. Today you will be hard pressed to find a Glaciologist tell you that our sea levels will rise by 1 meter by 2100. We've got more data due to GPS satellites and other technologies. Before GPS we relied on simple equations for Conservation of Mass, Conservation of Momentum and relied on a simple flow law for ice. Ice is has VERY complicated flow...
Other than the calving of ice sheets and glaciers, global warming is a real threat in the long term (1,000 to 10,000 years from now) and there is geologic proof of how devastating it can be for life on Earth. The worst extinction event in Earth's history was NOT the dinosaurs, it was before that (the Permian-Triassic extinction event aka the "great dying") where the most prominent cause being greenhouse gases. Even insects died from the atmospheric alteration, and that's a scary thing.
I'll post more about it later if anyone is interested.