Like aadp said, I'm not saying Quarless was a bust, but at the same time, you can't compare rookie stats to make a conclusion.
Finley didn't play until late his rookie season, if I'm not mistaken, but it was pretty easy to see the raw athleticism and potential that he had. Just off my opinion, Quarless didn't show the same potential, and drafting 2 tight ends seems to suggest Packer management feels similarly.
I'm not saying he can't/won't step up, but even accounting for the "well, he was just a rookie" disclaimer, I think Quarless has been underwhelming.