Razib Khan:

Over the years I found that most people, even those we would consider quite educated, who are quite academically accomplished are far from intellectuals. Most people simply apply their intellect to their job, after which they focus on practical concerns or entertainment. They lack innate curiosity about the world or a drive to follow-up on things that do strike their fancy.

Joshua Foer wrote about the connection between people with high IQs and practical intelligence in his book, Moonwalking With Einstein.