Tar Heel Talk is reporting that DeMarcus Nelson has decided to attend Duke, and that the Greensboro News & Record will confirm this Wednesday.
It would be an exception if Duke did commit to someone this early. Typically, Duke waits until they've seen someone in different situations and gotten a better feel for them. That's why Mike Dunleavy was offered instead of Casey Jacobsen - he came on later in his high school career and was highly promising.
At any rate, if they are correct, the N&R will have the story in the morning.