Before or After: David AS Goliath

So, I’m told there’s this debate among artists, historians, art historians, and other merely interested parties as to whether Michelangelo’s sculpture of David is supposed to be a depiction of him before or after his slaying of Goliath. That is something that I went into the Academia intending to formulate an opinion on for myself. The first thing that struck me about the statue was it’s scale. I had it in my mind for some reason that the statue was life size, and was supposed to be an incredible example of the human form. Imagine my wonder when I walk into the room and see a depiction of David, as Goliath. The detail on the statue is absolutely amazing, there’s no way I can explain the monument for you here. After all, entire volumes have been written by much more gifted writers than myself, for now, I’ll refer you to them. I did form my own opinion on the debate though. I believe that it is before he threw the stone. There are two main reasons for this. First of all are his eyes; they are focused very intently on some object off in the distance, rather than being elated at his victory. Secondly is simply his body’s position. His weight is in his right leg, and his left leg is raised, cocked at the knee looking as if he were preparing to move quickly and powerfully. What it actually reminded me of was a pitcher just leaving his set position on the mound. Hopefully, I’ll have a picture up soon and you can find out for yourself. For now I can't seem to find one that will link correctly for my post. You'll have to find one for yourself... shouldn't be hard. What do you think, before or after?