Joanne Jacobs points out that growing up is hard to do and links to this USA Today article about extended adolescence:
"In the 1970s, a bachelor's degree could launch a career and support a family. Not anymore. Now, graduate school is almost a necessity and that means greater expenses, often when students are still saddled with college loans. More years of schooling also mean a delay entering the workforce. In this down economy, there's also stiffer competition for jobs. Financial independence is but a dream for many."