Nope, can't give you any examples, since I don't know where he gets his material. But if he truly is being used, he'll soon be taken about as seriously as DEBKA, huh?
I wouldn't go that far. I think he can still break stories killed in news departments, and also popular culture type stuff as the recent barbara streis... bs. I simply find it hard to believe that this WH has someone that would leak something to Drudge. What would they gain? If they got caught, they could be out.