Yes, you understood correctly. Being part of the IPCC and in my job in government I've actually worked with and have sat with scientists who have done these calculations and these experiments, and I've rigorously questioned them. In the end, I've been convinced that they're right. In fact, we have seen the change of the climate, in temperature particularly. It's outside of normal variability, and the only way we can understand it is by invoking the effects of greenhouse gases on the climate.
On November 7th, 2006. See this statement in context.