As they teach in any college psychology class, the IQ test was designed to point out people with learning deficiencies. So while it is accurate is spotting people of low intelligence, the inverse isn't true. It's not very good at pointing out people with high intelligence. Besides that fact, there are many different types of intelligence. While I haven't researched this part, the IQ test is probably only suitable for something called "crystalline" or "fixed" intelligence.