Challenge accepted, although a bit difficult to find. I think ESWC started the trend, Cyv3k were pretty young then, like 15/16 if I recall correctly. It's best to wait for Cl0ck to come correct me.
I remember the story of a sad av3k sitting in the crowd spectating at ESWC 2006, he was 15, too young to compete.. The following year 2007 he won ESWC against cooller in the final.