From what I have seen/played either I get really lucky in Diamond or there are some really dumb Diamond players. Maybe its that there in diamond and they don't expect cheese or that they just don't know how to beat it idk. I have seen my friend and I have done cheese after cheese in diamond to mess around one day it we lost very few of the games. Maybe it was just a very lucky streak.
Also I was I was in Korea right now as I would be gearing up for 2011 GSL!