I’m not sure I buy into the concept of intelligence as a distinguishable, quantifiable attribute. The term is loosely used to encompass a wide range of skills: problem solving, language skills, reasoning, spatial visualization, abstraction and, according to some, social acumen, creativity, physical coordination, etc.
Which of these are indispensable to intelligence and which are just fluff? If you do manage to quantify these individual factors, how much weight should be given to each in trying to quantify global intelligence? These are, in the end, all highly subjective calls. Those who devise the measuring systems will inevitably bring their own biases to the process. Where does this fit in with science?
How well one functions in a given situation will not be determined by any comprehensive intelligence ranking, but by how well one’s specific skills meet the challenge at hand.