I think I'm going to go against the consensus here.
I'd say the character makes the Jump skill check. If the result is equal or greater than the distance between the duelist and the intended target, then he can move that distance as a free action and receive the +2 bonus to attack and damage.
If the result is less than the distance between duelist and target (but more than 5 feet), then he must expend a move action* to close in on the target.
Correct me if I'm wrong.
* Well, it's a choice between a move or a standard action, according to the definition of extraordinary ability.