I'm french (France French ), there was a huge french DAOC community that managed to remain in touch through all the new games since its glory age. All that community remained in contact through well known guilds (such as http://www.warlegend.net/ and Millenium to some extend).
Ever since the end of DAOC, whenever a new game was released, french player interested in pvp knew that if they wanted to choose a pvp oriented server, they had to follow that guild. This is not new, and happened in Wow too, Archimonde server was, and still is, 'the' pvp server for french player. I had countless of arena teammates leaving for Archimonde for how easy it was to find 5v5 arena team, rbg team there compared to other server.
This community has existed for the past 10 years, and it's no surprise that for GW2 release, and especially considering it's a WvW game, that most of the french player interested in pvp followed them on Vizunah ( http://www.warlegend.net/classement-...-guild-wars-2/ ).
I'm currently playing on Desolation but every single old arena teammate I'm still in contact with, are on Vizunah, every single one.