This report argues that "the suburbs" are diverse. You bet. In 2010, just the U.S. major metropolitan area's suburbs included 167 million people, more than 54 Percent of the U.S. population. That is more people than included in most countries. I have argued many times that we have to move to more refined classifications. "The suburbs" has a 1940s-1950s ring to it.
Yesterday, the NY Times tried it's hand at describing Los Angeles' San Fernando Valley, "Los Angeles? The Valley is Way Cooler".
But at 260 square miles, there is not much of a neighborhood feel to describe. There are many neighborhoods which are radically different from each other. "Valley Girls" exist in bad movies and TV shows. "The Valley" may have been a place once upon a time. But that was almost 70 years ago.