I don't think Wilson is a top-6er, I think he's a 3rd liner that just fit with guys like Ovi and Backstrom. He's a complementary kind of piece, he's a better version of Zack Kassian. I still think he's a 3rd line agitator, he's just fitting well with who he's playing with in the top-6.
Before the last 50 games, I would have agreed with you. But seeing his hand-eye coordination blossom (that goal yesterday was not an anomaly) leads me to believe he deserves top 6 time. He's fast, he can get into the right "places" to release a one timer, and he draws opponents to him...thusly creating space for his linemates. He's also showing that he can pass well too.
He's turned into a top 6 winger. And he's still young. Power forwards take longer to mature, so....we will see