Hey There!
Before I start I just want to point out that this is NOT a way to get off the island early, only the training area before completing the first quests.
This is fairly easy and probably pretty useless for most people. While searching for a way out, I had found a way to walljump outside of the pandaren training grounds before completing the first quests. As you probably have seen or tried to explore when starting a panda, there are invisible walls and doors around so you can't just simply jump off the mountain side. This video will show how to get past those invisible walls.
While browsing the neutral panda thread * (Neutral Pandaren with both factions when get out starter zone) in the exploits section, I saw that people were interested in getting a neutral panda to 90 without questing at all. This method will allow you to do this. I hesitated either posting this in exploits or exploration, because for me it was pure exploration, where others could use it as an exploit as well.
Thanks for Watching! Stay tuned for more explorations.
-Teryaki