When Data is rolling his 19 straight passes he looks like he's having a lot of fun. Is he really enjoying himself or putting on an act?
If he's enjoying himself, he knows how to act like a human.
If he's putting on an act, he understands what he's doing enough to act like a human.
However you spin it, Data has successfully become more human, but it will never be brought up again after this episode. Why? Well, like many questions this episode brings up, it's never answered.