Is there an addon that, records wins/losses in bgs? On more than one toon. I would really like to bust the myth about horde allways winning bgs on my battlegroup.....

This is one of problems too...

I believe there is a way to check your BG statistics through your achievement panel but I could be mistaken. Beyond that, however...

...there are some really old addons on WoWInterface that I think were designed for what you are asking for; however, with how out-of-date they are, who knows if they function correctly. You can try installing them, checking the "load out-of-date addons" box on your addons screen and giving them a whirl. Maybe they will be just fine. I was using, until quite recently when the author FINALLY updated, a mod over a year out-of-date, and it worked perfectly. Some mods are like that. Others... one tiny update and they're sending error messages up the whazoo. I guess it never hurts to try.

http://www.wowinterface.com/downloads/info9528-BGInfo.html

http://www.wowinterface.com/downloads/info9784-BattlegroundDataTracker.html

http://www.wowinterface.com/downloads/info9962-bgTrack.html