Once I heard a guy from the MIT Media Lab speak. His name was Dr. Michael Hawley and he had a lot to say. The thing I remember most vividly is this quotation that I've carried with me since I heard it back in 1999.
"A different perspective is worth 100 points of IQ."
Today I ran across the datum below from the "Latham's Quarterly," a magazine wholly worth your attention.

10 IQ points is a lot of points. If you're an average brain, it probably leaves you functioning at high-dimwit levels. If you're already a dimwit, you might wind up thinking like a bonehead. If you're already a bonehead, a 10 point decrease might leave you acting like a numskull.