Okay, you made me actually click through the link, and I can find: > As noted above, Hansen's model overpredicted the ensuing global warming thus far by approx

Okay, you made me actually click through the link, and I can find: > As noted above, Hansen's model overpredicted the ensuing global warming thus far by approximately 15 to 25%. Thus if we estimate that the sensitivity of his model was 15 to 25% too high (which is an oversimplification, but will give us a reasonably accurate back-of-the-envelope estimate), ... Predicting global warming for ~30 years within 25% in 1988 seems "pretty accurate" to me, isn't it? Surely it's a far cry from the skeptical position that models are so wrong that we can gain nothing from them.