Define accomplished? Are you saying that he has accomplished what Tony Dorsett or Emmitt Smith weren't able to in a season overall? Yes, he has more 30+ yard TD's than those two, but if you say that one facet puts him in their ball park I will laugh you right out of here. There are many more things they were able to "accomplish" in a season, and a career to this point to say he is "special" with the implication that those two (and a couple or so others) aren't.
I love Pollard and what he brings to this team, he is the best back we have right now. That said he needs to show it as a bell cow, that as you said is taking pretty much every snap, before we can compare him to our lucky history with HoF and near HoF backs (here looking at you Perkins).