Are you a member of the Del Negro family?
I don't watch many Clippers game, but from what I've seen, his minute managing is superb. The Clippers defense went from poor to decent to very good under him. He utilizes each player into different roles and had them buying into the team picture.
It's really just my opinion. I don't know about his personality/player relations/logistics, but judging on what I've seen, he's a pretty good coach.