Getting me wrong there Nymzee. I didn't say he turned quickly as a defender, I just gave you an example where he did take up a position and had to turn in attack and he looked reasonable.
This might just be down to the fact defenders are usually reacting to the strikers moves and often they get the jump so you need extra recovery pace to cope, that he doesn't have. It might be he over thinks things, or could just be he isn't a natural defender.
I wouldn't have him upfront all game as that would be crazy, he has shown the ability required to grab a goal though.