Are we too hard on teenage girls, and too easy on women in their early 20's?

As my friends’ daughters and nieces reach their teen years, I’m finding that they don’t fit the negative stereotypes of teenage girls that I see portrayed in the media. Now, I don’t have to parent them or date them, so maybe my view is skewed, but I’m actually finding that they are more pleasant to be around than women in their early 20’s—women at that age are impossible. There’s no talking to them. Their lives are just one big soap opera, and if they’ve gone to college, their heads are full of social science half-truths which have not yet been tempered by life experience. Yet women in their late 20’s are the human beings whose company I most enjoy, so something must happen around age 25. Maybe this question should be, what’s the deal with women between the ages of 20 and 24?