I'm sure that's an accurate state based on extended data. But can't help myself mentionning these numbers don't make sense to me, considering the experience i've had in open-world.
That's because on Fury the sense of community was ****ed up. Big guilds hosting PvP players didn't give a damn about what their players did as long as the guild was efficient. And smaller guilds weren't very often better. They gather together merely by convenience. It was more convenient to be in a guild to access Raids, hard modes and mini-games than otherwise. But the community sucked. People got use to play solo.
It was the bulk of the talks we had with friends when passing from our french server to Fury. While our little Rp-PvP server was all about pride and cohesion. Fury was all about efficience, wanting everything and know ! It was not more populated than fury these days i believe. But hell, guilds at least meant something.