I would think they have the same logical system as [SS] did, everyone can join by setting a clantag and nobody knows each other.
It's a shame, heh. OA is a good game but there aren't enough NA players; most of the players who play on our server have pings greater than 100. It's definitely the reason I've lost so much interest in the game.
Hopefully more NA clans will pop up eventually so we can get a ladder going. BRUTAL is hungering for some competition...