Yeah, they just use those gods as examples so the paladin, cleric, and druid classes can be seen in context. The PHB is not specific to the Greyhawk milieu because there is no campaign information specifically dedicated to Greyhawk; i.e. no description of the city of Greyhawk and its environs, no maps, and no discussion of cultures.
Ya, in the context of greyhawk.
this is a stupid thing to argue about anyway so I'm not going to.
Its retarded to say that even though everything in it that is campaign specific is specific to greyhawk, its not greyhawk.
I mean WTF?