Do Nikon's DX format lenses "scale up"?

This month's Popular Photography has a review of Nikon's 55-300mm f/4.5-5.6G DX ED VR AF-S lens. In the first paragraph, they say it scales up to the full-frame equivalent of 82.5-450mm. Does it? I was under the impression that it was only FX lenses that do that on a DX body, not vice-versa.