10 points in 31 minutes for a starting PF aren't great numbers. Plus, who else can take boards off him? He better be able to grab at least 9 boards in 31 minutes. I never said he's Bargnani.
He had to compete with Varejao (who was playing amazing compared to previous seasons) to begin the season so his rebounds were a bit lower. He's picked it up though with more opportunities the way Ed Davis has when he got more opportunities. Not to mention the 11 PPG being 6th in FGA on the Cavs is solid.
And if those numbers aren't good, what does that say about Davis? For the month of January when both have been starting, they've been playing similar minutes but he's been outscored and outrebounded.