Different Definitions of New Adult Fiction

The more I read about New Adult Fiction, and the more definitions I read that are different, the more confused I get sometimes. On one hand I see real new adults...the people who are writing new adult and are actually new adults...doing something interesting based on their personal experiences, which I think I like the most so far. Then I see the mainstream media pronounce new adult as the new version of YA smut, which I don't agree with at all. And of course, I've also seen the sex police bloggers trying...