Not that this speaks conclusively to his shooting ability, but I'm virtually certain that Jones was a contestant in the 3-point shooting contest at this year's McDonald's All American Game. Can't find a link to confirm, but pretty confident that's the case.
ETA: Sure enough, my memory was correct. Per his GoDuke bio, he finished second.
Just be you. You is enough. - K, 4/5/10, 0:13.8 to play, 60-59 Duke.
You're all jealous hypocrites. - Titus on Laettner
You see those guys? Animals. They're animals. - SIU Coach Chris Lowery, on Duke