Hunter had a good Summer League not because of his points scored or assists attained or rebounds gotten. He didn't have a good Summer League because he was playing against inferior talent.
He had a good Summer League because he showed an ability to hit the three under all sorts of circumstances, because he showed an inherent understanding of how to play the game right, because he showed excellent form on his shot, and because he showed he is willing to commit to playing defense. He showed he has what it takes to be an NBA player. You really can't ask for more than that out of a player in the Summer League.
When I watch Summer League or watch college basketball scouting for the draft I don't care about stats. They are unimportant compared to whether the kid has talent, whether he knows where to be when to be there, whether he shows he has the fundamentals of the game down, whether he plays tough, whether he plays smart, whether he gets the team concept, whether he has the physical ability to thrive at the next level. These are the things that are important, not stats.