The giant numbers posted by a lot of their forwards are, in part, due to some ridiculous shooting percentages right now. Wennberg is shooting 17.8% (8.8% career). Atkinson is shooting 17.4% (11.4% career). Gagner is shooting 16.7% (10.2% career). Harntell is shooting 17.3% (11.7% career). Saad and Foligno are also shooting above their career marks (although not a career high for Foligno). Even Seth Jones is shooting 11.4% (5.4% career).
That's not to say Wennberg hasn't taken significant steps forward. He's definitely a better player this year. But his numbers are inflated a bit not only because of his unsustainable shooting percentage, but the general ridiculous shooting percentage on their team. 50% of his points have come on the powerplay, where he's playing with Atkinson, Gagner, and Foligno.