Strand of the Ancients is a battleground that's gotten relatively short shrift lately -- it came along into the game with the crown jewel of Wrath PvP so far, Wintergrasp, and while it's still frequented on honor weekends (it's one of the best ways to farm honor, actually) and for achievements, lots of players, specifically those on the Horde, aren't happy with it. Why? Because right now, Alliance always starts the battle on offense first. The battle is a regular attack-and-defend map, and Alliance reportedly has a "significant advantage" by beginning on the attack side: they only have to play offense for a few minutes, and then defend for the same amount of time, while Horde have to defend the whole first round and then attack if they want to win. Plus, the battleground doesn't always start full, which means whoever attacks first usually is fighting fewer defenders.
So how hard would it be to throw a coin flip in there and randomize who starts first? The good news is that Blizzard is working on it, but the bad news is that it's taking longer than they thought. It's not as simple, unfortunately, as choosing a faction randomly -- there are apparently mechanics in the spawn points that make it difficult for them to randomize who shows up on the moving ships. Go figure? We've never understood how Blizzard's code works, and we're not starting now.
But again: Zarhym says a fix is incoming in a future patch. So if you're Alliance and you want to do some honor farming, better start now.