Introverts Have More Brain Activity?

Yahoo News is reporting that introverted individuals tend to have more brain activity in general, specifically in the frontal lobe. From the article: "The attitude that there's something wrong with introverted people is widely shared in society, where fast talk and snap decisions are often valued over listening, deliberation and careful planning. Extroverts seem to rule the world or, at least, the USA, which hasn't elected an introverted president for three decades, since Jimmy Carter."