Well there must be some objective truth to intelligence. Come on, you must know people who are just plain unintelligent. I agree that it is very difficult to accurately measure someone's intelligence and that IQ ratings are far from perfect, but it is certain that not everyone has the same intelligence.
"People who place any merit in IQ tests are those with little intelligence at all."
Straight-up. Intelligence is perception and after all it doesn't make you a better person. Additionally, half of the people in Mensa have no lives. I can vouch for that. Einstein was nowhere near the most intuitive or revolutionary thinker in history. How bout we use other examples =]