Velociraptor Had Feathers

Spy der Mann writes "A new look at some old bones have shown that velociraptor, the dinosaur made famous in the movie Jurassic Park, had feathers. A paper describing the discovery, made by paleontologists at the American Museum of Natural History and the Field Museum of Natural History, appears in the Sept. 21 issue of the journal Science."

Comments

Something doesn't add up for me

[OfficialReverendStev]

See, in the article it mentions briefly before getting to the feather part that the Veliciraptor may be smaller than originally thought. Then it goes on about how this guy found bumps on the arm bone that correspond to bumps on the same bone in birds. Alright. But then it mentions that the bumps have never been found on any Velociraptor bones before.

My question: Why is the conclusion that Velociraptor had feathers and not that they've discovered a different species?