Saia Fainga'a, Australia: Captain of the tournament winners in the UAE, the Queensland Reds No 2 could be the Wallabies hooker come September.
Will Genia, Australia: Content with a place on the bench for Australia then, but he is now one of the first names on the team sheet for the senior side.
Bradley Davies, Wales: The towering captain of the Welsh class of 2006 has already established himself in the full national side's second row.
Cian Healy, Ireland: Now a pillar of the front-row for the European champions Leinster, the prop scored a try in the fifth-sixth place play-off win over Wales.
Keith Earls, Ireland: Within three years of representing Ireland's Under 19 side, Earls had been picked for the British & Irish Lions by Sir Ian McGeechan.
Victor Vito, New Zealand: The captain and outstanding player for the 2006 Baby Blacks is part of a battery of back-rowers for the current All Blacks.
Dan Cole, England: Fresh-faced in England's front-row back then, Cole is now the world rugby's oldest-looking 24 year old and a highly-regarded prop.