I play on a server called "Sith Wyrm" republic side, and I firmly believe that the reason why my sever has a 3:1 server ratio in favor of imperials is because of (perhaps strange to say) the server name, because it is so soon after launch that the only real thing that defines any server at this time is its name, pvp/pve/rp status, and time zone, and sice the name is "Sith Wyrm" obviously there are more imperials then republics on the server.