My hypothesis is that the best predictor for belief in the validity of IQ, is IQ. I'm not sure if that would support or contradict your statement. I'm sure it could be used to argue either way.
Great article, thank you. It's the first well reasoned anti-g argument I've seen. I'm going to want to gather more information before I make a decision but I'm glad to have read something that challenges my opinions enough that a decision has to be made.
I attended a talk on multiple intelligences a few years ago. The speaker, a research psychologist, said that there are indeed several types of intelligence. They all covary with each other and the property with which their covariance is greatest is called the g factor: general intelligence. The best (but not perfect) measure of g factor is IQ.