Out of my entire wow career, I have spent 5 as horde and 4 as alliance, dual mains. This is my opinion and only my experience but I have found the alliance to be a infestation of casual type players. In my 5 years, I have never received a ticket for language on my horde toons, on alliance if you say "ass" or "dousch" some uppity like bitch will report you. As a player, I'd like to consider myself a harder then average raider usually us 200, I can assure you the alliance lore has nothing to do with why I would faction change. Hard core raid guilds will never transfer because of lore, ever lol. It has been my experience that the alliance community is a do nothing community. Granted I have players on Anetheron(now dead but was kicking during lich king), Uldaman(during lich king and cata and the start of mop) and firetree(BC) but those communitys were once thriving with people and now are pretty much deserted. While they were thriving though, the community was just one extreme of being arrogant try hard pro or complete noob. It was the same on all 3 servers, and after personally trying to show new players raiding ethics in cata with it dismally failing I gave up. Excluding ToT because of the troll racials, I don't believe racials really have to do with it. If your looking at 1-2% damage thinking hey these racial's would push it. Maybe if it were a beast boss and you had 10+trolls lol. If your looking for that 1-2%, then your raiders arn't exploiting the same bugs everyother HM guild is doing out there. iceblocking on H council, juicing IQ etc. I really feel that the alliance community is the reason why many guilds are going horde, they are too good know it all stuck people for the most part. In my experience. If you do some research on worldoflogs and look for ranking players, the majority are alliance and not horde.