So, from the standpoint of a fan, the Nentir Vale and Nerath and all its associated proper nouns and cosmologies and histories and events are absolutely a distinct, different, unique, D&D setting. It's among the pantheon of Basic Fantasy Settings -- Greyhawk, Forgotten Realms, Dragonlance, and now Nerath.
That just does not seem to be the case, not nearly as definitive or iconic, yeah "...Nerath…what…?"