Is it 600+ players on a single server, or is it like WoW/UO/EQ where the game world is spread across multiple servers, so it’s not ever actually that many people on a single server? It was kind of important for PvP to know where the server lines were because crossing them caused a spike of lag as it switched the server you were on.

If it was a single server that would be impressive. Otherwise, it’s pretty laughable.