Dunno, but I think I've always been losing as Horde. At least we've never been winning more than 50% of the BG's I've been to. Well, have always had a lot of premades against us on LB... The same for everyone, I guess.
WSG is fucked up anyways, if you ask me. There should be a time limit to it, or something. AV is nowadays my favourite BG, definetly. I kinda find it sad, though, that after that one patch it turned into zerging. :F Good ol' 30h+ AV's ftw. ^^