So apparently this has been common knowledge for awhile. Last night we were screwing around before the match started in a tournament. Were just finding weird spots to climb up too, like behind the keep you can get pretty high on the rocks. Anyway, turns out if you are in the sliding motion that usually occurs when you can clearly jump onto a spot but it's not accessible, when the game begins, you will not be sent back to the starting area and instead will load right where you were in the sliding motion.
After a little playing around with it we found it you can do it pretty much anywhere if you time it right. Needless to say this is a pretty major bug for sPvP.