what does it matter?
My 2 cents; I had to take a controlled IQ test in Highschool to get into a special class for 'gifted' kids, I did well - 145 but felt insulted by the notion that the correct answers where a 'gift' they were all areas in which I had great personal interest, namely solving problems. A skater punk friend of mine seemed to have been of similar intelligence in my opinion but after taking the test I could see that he would do very poorly, yet he 'knew' so much that I did not. Today we are both computer geeks and probably do just as well at our jobs. I took one of those online tests recently and my score hadnt changed much - 143.
so my conclusion is this; IQ must actually measure something real, my wife did the same thing 153 in middle school 151 recently and I suspect another one of my friends would have been 100 and 100 had he taken them. The differences are not an illusion, it is merely the assumptions we make of what that number represents that is an illusion. My wife and I are much much smarter than my friend, he is litterally more successful than us than we are 'smarter' than him. However, we are in fact measurably 'smarter' there are endless complicated problems ranging from social, mechanical, technical, etc... that I know I could solve with ease that he could not, some not with ease, many, never.
so what?
IQ = Human Brains clock speed, litterally speaking, he has a 1000mhz processor and I have a 1445mhz processor with multithreading capability. this in no way measures how much ram or hard drive space either of us have and most importantly does not measure what is ON our hard drives (knowledge) I also happen to have more knowledge (not better, just more quantity) than him, but that has never been measured by a number, however the lower amount of knowledge that he has is worth twice as much money as my knowlege.
so IQ does in fact matter, just not any where near as much as many people choose to make it matter. For things like world peace and cold fusion, you just cant subsitute a lot of average brains for one elevated one. but for just about everything else that matters, namely being happy, you are way better off having the average 100IQ, that means that you fit in, you understand the average person, lower and you are confused, higher and you find yourself very frustrated, not a desireable place to be.
just my 2 cents