[An] IQ test … only measures how good of an IQ tester you are.
1) Believe [it] or not, you can improve IQ test score by PRACTICE. See for yourself. It is no more than a computer game which some people may show great playing ability at first but eventually most of people can excel with lots of playing time. There was a time when some people believed Tetris can be a good measure of how good one’s brain is.
2) [The] IQ test was NOT created to evaluate [an] adult’s brain capability. Researchers devised the test to see if they can discover children with learning disabilities. That means [a] low score is the only meaningful [outcome]. The test was designed to estimate if the children are behind or advanced to their own peers. In other words, it only shows one has a brain as good as normal adults with perfect score.
3) Despite these facts, IQ test can sometimes distinguish smart/less smart people in certain areas. However, so can other measurements (e.g. education, family background, living environment). The issue here is how accurate the measurement is in evaluation of brain functionality. Basically, you will have to measure how fast and efficiently your neurons are working along with density of neurons. Even then, this measurement may have nothing to do in judging one is a genius or not.
4) Nobody’s brain is infinite and [neither] is genius’ brain. One can maximize the productivity in a certain area by eliminating the need of wasting the brain in other areas and solely focus on one area, say mathematics. You can brag about how much you know and fast you can solve a problem; however, developing a new idea is limited to still to the areas you are familiar with. Unlike 1600s, there is too much to know and understand to master the entire area of mathematics or a piece of area in mathematics.
5) Speaking of understanding, how do you accelerate the speed of understanding? As prof. Tao pointed [out], one should have enough knowledge to process the reasoning. As you know more about the field, your brain can eliminate the things that are irrelevant to the subject and also relate to the ones you already know; thus, works more efficiently. For instance, study the strategies in chess, then, you would be able to beat normal people in most of times in chess game. No matter how genius…an individual is, s/he cannot beat out an expert in understanding the subject without proper training or learning depending on the difficulty of subjects.
Still, the illusion of genius is fun to enjoy in a similar way to we want to admire an excellent individual in each area. I think it is no different than praising a sports star.