My vote for the greatest deadlift of all time was pulled sumo.
http://www.youtube.com/watch?v=-dpRChwpmaM
I knew it! :-) It was the same way with Coan. I heard he could only pull 315 conventional. I think I know what the next big thing for "man lifts" is going to be... walking squats in! Yes, you may walk them out, but after the rack command you are getting assistance to bring the bar back into the rack. That is cheating!!!
You may be walking your squats out and in, but without any side to side walking, you're going to be very easy to kill.
No, even then it would be foolish.