He's playing with so much more confidence now, and a lot of his scoring is coming from improved defensive play. He's playing a lot more aggressively in his own zone and is using his speed to break up plays and turn those into breakaways. Also, I think playing with Okposo and Nielsen has helped him, as both are highly reliable defensively, which allows him to play a more aggressive game, with less fear of making a costly defensive error. But what I've found most impressive about his offensive explosion is how the vast majority of his offensive chances are ones he's creating for himself.
I don't suspect he'll continue this torrid scoring pace, but if he can keep playing with this kind of confidence, I wouldn't be the least bit surprised to see him become a consistent 30+ goal scorer.