Sort of… these are the same forums that we started on during Classic progression (predating Era), and they match the nomenclature of the file directory schema.
So while this forum may currently be the de facto Era forums for many users, it certainly didn’t start out that way, and its naming doesn’t make it obvious for new posters that that would be the case, if it is indeed intended to be so.
Grobb does have at least one raiding guild on each faction, that appears to have a very healthy rivalry, which would undoubtedly mean some world PVP.
However, of course the OP here seems to be referring to Classic (Progression, which currently happens to be on Cata).
OP, there are Cata specific forums. There are also server specific forums, such as the Grobbulus Forums. You should be able to edit your post to move it to either of those if you feel they would be a better fit for your topic.