When Steven Johnson's book about popular culture hit stores in May, he was prepared for a barrage of hate mail. After all, the author takes a rare position: that playing video games and watching TV shows like "The Sopranos" and "24" actually expand minds rather than numbing them. No flurry of angry correspondence has arrived yet, but that doesn't mean the book, "Everything Bad Is Good For You: How Today's Popular Culture Is Actually Making Us Smarter," isn't stirring debate. Critics are concerned that the title alone will give Americans - and their kids - license to spend more time...