For centuries, prior to intelligence tests, the game of all games was chess. Thinkers, deeply focused, intense thought. Perfect in areas where details are critical. However, rarely, quick communicators. In today's world, they seldom are able to handle the give and take needed in sales, customer service and the like, dealing with regular people, or professionals in any degree of intensity.
Intelligence tests evolved to measure that ability to focus, to reason and to think. But they seldom see that all important speed of communications quotient. So, they are of little help when a Manager needs someone who can communicate clearly, and seem bright about it. Bright implies speed, but not too much, while smart may imply that deep thinker...