I think with respect to K, you are correct. Lazy sportwriter. But I think the view that Duke students being from wealthy famlies has been a perception for a very long time. And its a continuing perception because the press and others of such ilk are lazy in their reporting.
When I was a student a Fuqua, I wrote a letter to the editor of the Durham paper in response to just this issue. In my family, my father worked two jobs and he taught me, more than anyone, what a strong work ethic is about. I attribute getting into Fuqua and my success in the business world to his teachings.
As with anything in life, if sterotype groups of people, your going to get it wrong.