Returning To GW2 population?
There are always people around in PvE because of the Megaserver system. Sometimes a bit too many people….
WvW has, in my experience, quieter times even on the full servers. But if you are just looking to run in a zerg, Edge of the Mists is running 24/7 with 5 min breaks every 4 hours.
Someone will probably chime in with the information which servers have concentrated OCE/Asia population for WvW purposes.
I believe most players in OCE play on the English-speaking servers. You should read up on Megaservers – theyre an intriguing new system that makes that it essentially doesnt matter on what world you are – everyone gets nicely condensed into maps so you almost always see people.
Chinas servers are seperate though, i think, and theyve probably also got seperate forums, so you should check up there instead :-)