Sawbutcher, Saw Wheels and Items

[Caliginosus]

When playing a Sawbutcher one of my favorite things is to run at an enemy with Saw Wheels up and imagine how my character actually rolls the path with its wheels, very quickly.
So it really surprises me that non instant items do not break Saw Wheels. While it might be fine with injectors and such, doing a Skullcracker from an item and then moving on with the buff up feels off.
The skill description doesn't speak of items but talents. Aren't item talents considered talents too?
Not sure if this is a bug or a matter of taste and interpretation, but I needed to get that off my chest!

Cheers!