It's possible though that this is analogous with running. An IQ test could be seem as a relative sprint whereas the business of solving genuinely complex proble

It's possible though that this is analogous with running. An IQ test could be seem as a relative sprint whereas the business of solving genuinely complex problems might be a marathon. A 'sprinting test' may actually provide a rough gauge of general fitness and physical ability - and in so doing be a rough predictor of marathon performance in the general populace. But at the higher levels those with fast twitch muscles are actually at a disadvantage in a marathon against those with slow twitch muscles. Extrapolating the sprint result to the marathon only works at the very crudest level. Of course I'm not saying this is actually the case with intelligence but in certainly could be.