Dai Young hailed young gun Leigh Halfpenny following Cardiff Blues' 58-0 rout of Connacht.
Wales Under-20 star Halfpenny grabbed a quick-fire double as the Blues ran in nine unanswered tries at the Arms Park.
And Blues coach Young reckons Halfpenny, 19, is ready to set Europe alight next month.
Young said: "Leigh was outstanding and thoroughly deserved his man-of-the-match award. He was the leading light for the Under-20's last summer and is a quality player.
"He really gets the supporters on the edge of their seats and could be a big surprise to other sides in the next month especially in Europe."
Fly-half Ceri Sweeney scored two tries in an impressive 21-point tally while Jamie Roberts, Rhys Thomas, Gareth Thomas, Ma'ama Molitika and Taufa'ao Filise also touched down.
Young added: "We were excellent and our quality really shone through in the first half. The forwards set up the platform and the backs were clinical - we're building momentum at the right time."
Talismanic number eight Xavier Rush produced a 40-minute cameo on his return from a knee injury while Wales flanker Martyn Williams is back in full training ahead of their Heineken Cup opener on October 11.
WRU International Skills Coach Jason Strange is a busy man, combining the new role with that of Wales Under 20 attack coach, Ebbw Vale head coach and continuing to teach at Ebbw Fawr Learning Community.
Warren Gatland and Sam Warburton look ahead to this week's crunch RBS 6 Nations tie against France, where the Wales skipper in particular is keen to make his mark, as Paris has proved a bleak place for him in the past.
Following their historic win over England, Wales Under 20 suffered a narrow, 36-34 loss to their Scottish counterparts last weekend, despite outscoring them by five tries to three. Watch the match highlights and reaction.
WRU TV go behind the scenes with the Wales squad as they put the final touches in place ahead of the clash against Scotland at Murrayfield. Follow the squad on their captain's run, the kickers visit to Murrayfield and Neil Jenkins' press conference