When I quit WoW I remember Illidan-US being a total ghost town on the Alliance side. A friend of mine (that stills plays WoW and used to roll with me) transferred to Darkspear because he told me that at one point he was the only person in Stormwind City. I didn't ask at what time he checked, but that seems excessively desolated. I remember reading somewhere that Blizzard doesn't disclose their server population statistics, which is sad because I feel that kind of information would be very useful. There is WoWCensus, but how accurate it is? I'd like to know.
What's your server like in terms of population balance? And overall, in all servers, which side do you think is usually more represented? I have the impression that Horde outnumbers Alliance overall.