While exploring the class forums on swtor, I found a great world PvP video of a Jedi Sentinel at Tatooine from nahman. He fights everyone at full health and no less than three level difference... (though at the beginning he kills a Sith Assassin that was 7 levels higher than himself). He also has a few fights where he successfully wins against two players.
The class looks really fun and is starting to make me rethink my initial class choice! ;p
http://www.youtube.com/watch?v=RrvnxfSDomQ
Enjoy!