You're rating that 2011 side with hindsight of their achievements since though...
No doubt it was exceptional, but judging by the years since then it was really the first year when the new academy structure started to kick into gear (and the first generation of kids inspired by 2003 - seriously).
If the current system stays in place I would expect us to keep improving.
I, and most of the people I knew, thought the side was incredible at the time. It was clearly very talented and a lot of them had already started to make inroads into first teams. We outplayed the Baby Blacks in the final but spurned too many opportunities with the boot - and there were some very clearly very talented players in the Baby Blacks even at that age. Beauden Barrett, Charles Piautau and Sam Cane looked like "Whens, not Ifs", even at that age.
I would put money on the 2011 crop to beat either of the Cup Winning squads if given a time machine.
The full caps return from that age group
Lions & England
Vunipola, Farrell, Tuilagi (never actually played for England U20 due to club and senior international commitments but would have been part), Wade (just)
England
Launchbury, Thomas, Kvesic, Yarde, Joseph (didn't even make the final bench for crying out loud), Ford
England Saxons
Daly, Robson, Buchanan, Collier, Matthews
Sam Jones has played Baa-baas vs England, Gray has 7s caps...
Oh, nearly missed this one
Scotland
Kieran Low (missed JWC squad due to injury)
Wouldn't be surprising if Haywood (looked so good back then), Jones, Mills, Guy Armitage (didn't make bench) and Jamie Elliot (injured and missed the squad) were to all play a part some day.
Tbh, I feel that part of the reason we express surprise at how well our U20 sides do is that side spoiled us yet somehow didn't win it. That, and the standard of the U20 6Ns has risen a lot. It's not quite as obvious how good they are.