All one has to do is watch him play. His football intelligence and positioning is almost as good as I have ever seen in a 22 year old forward. He's always in the right place, and he's pretty much always aware of where his teammates are. Also, his passing is excellent.
Three things he has the talent to become world class in:
Positioning
Awareness
Passing
Finishing could be added to this, dependent on a bigger sample size. I haven't seen enough to make that judgment yet. He was pretty skittish his first couple months here, trying to do too much to prove himself. Now that he's settled in, his finishing has been very good lately, as has his passing. He's also almost always making the right choice now of whether to shoot or pass, after spending the first bit always going for goal, and then the second bit always passing, the last half dozen games he'd found the balance.