Interesting post. Just like other psychological tests (for instance MBTI), IQ tests are largely used at the moment. In my opinion there are flaws and needs revision. IQ tests should be taken as a guideline instead of categorizing someone based on the scores. (There are questions that have only 1 answer, and there are questions that can have multiple answers). Whether IQ is linked to creativity, we do not know yet. There are many theories and hypotheses about the origins of creativity, gender differences, etc. It could be nature, or nurture.