IQ and standardized test scores are generally useless in telling what people will be, and how actually smart they are. My definition of smart is a problem solver, a person that is also able to figure out multiple ways of solving something. IQ tests just test how "educated" you are, but not your ability to learn and comprehend. after all, I may know the meaning of a 15-sylable word, but that doesnt mean I "understand" it, as in, using it with semantics.

All in all, they DO have an affect on your life, but, technically, they shouldnt.