Delaying entry into the NBA draft certainly can't be an easy decision to make, especially when there's no guarantee that returning to school will lead to a higher draft slot in a future draft.
We've seen it work for some in recent years -- Cody Zeller and Terrence Jones are names that comes to mind -- but for others it can have the opposite effect. North Carolina power forward James Michael McAdoo is a good example of that; he'd have likely been a lottery pick had he come out after his freshman season, and a probable first-rounder had he done so after his sophomore season. Now a junior whose game is more established, he's considered to be a probable second-round pick (No. 40 on Chad Ford's latest Big Board).
Mitch McGary and Glenn Robinson III both could have declared for the 2013 and had a chance to go in the lottery, but they elected to return for another season in Ann Arbor. In the case of Robinson, that could mean both good and bad things.