Not really. I think he said in an interview upon joining the team something along the lines of "I'll fight if I have to," and that pretty well sums it up.
Look at his fight cards over on hockey-fights, you can draw a pretty clear distinction between middleweight goons (Barch, Stortini) and actual hockey players (Brandon Dubinsky, Robyn Regehr) who he actually beats and the legit heavies (Lucic, McGrattan, Bickell) who beat him.
I dunno ... I went and checked out these fights out of interest after reading this post, and Sestito seemed to do just fine. He didn't win, but most of them were closer to a draw than a loss. Bickell jumped him coming right out of a hit so had the upper hand most of the fight, and both the Lucic and McGrattan fights were sort of wrestling matches. A lot better than anyone the Canucks have had recently would have done against guys in that weight class.
One thing Sestito seems good at generally is avoiding punches (could be because he is enormous). I noticed it in the McGrattan fight the other night, but it carries over into the Bickell and Lucic encounters. He has questionable balance though, and that ended up costing him against Tootoo (though that spear looked pretty cheap to me).
He even had the upper hand in the Kassian fight before Zack hit him with one good punch. That seems to be Kassian's M.O. though, he doesn't care if he takes a few shots as long as he gets in that one bomb that drops the guy. I figure that's why his helmet pops off basically every fight.
So far Sestito looks like a better fighter than I gave him credit for coming over.