IQ as measured by these tests predicts one thing and one thing only: academic performance (on European-American-style tests). That's it. No correlation to creativity, job performance, wisdom, salary, etc. It is measured on a bell curve with a standard deviation of 15 points. The "normal" IQ is 90-109. 70-89 is low, 50-69 involves learning difficulty. 110-129 is high, and 130+ is "genius". Obviously these classifications have little to do with real life; the curve is useless for anything over 146 or so, and putting Wintersweet in the same category with Albert Einstein is plainly stupid.