Of course I don't have any proof. If I had proof, there wouldn't be any discussion.

A five minute Google search will show you that the vast majority of the models have ranged from being somewhat inaccurate to wildly inaccurate all in the direction of predicting more global warming.

Furthermore, I'm not aware of any other models with publicly released source code. In my opinion, that's ridiculous, since people want us to literally re-organize the economy around these predictions.

Do you want to defend the idea of keeping the source code for the models private?