Interim Wales coach Rob Howley claimed their dramatic Six Nations title victory topped the Grand Slam success of last year.
The 30-3 thrashing of England at the Millennium Stadium was enough to hand the Welsh the crown, while denying the visitors a clean sweep of their own.
"This is better than the Grand Slam last year. We were outstanding," said Howley.
"They have shown great fortitude and they outclassed England."
Wales endured a horrible run after last year's Six Nations triumph, but Howley said their belief never wavered.
"We talked about our discipline and attitude. To do what we have done after that first 30 minutes against Ireland is a great turnaround," he said.
"We kept on sending the message that good teams don't become bad teams overnight.
"We were consistent with that message and the players have gone out and delivered.
"The Millennium Stadium is a unique place in world rugby and we felt with our experience, with the crowd behind us, we needed to start well.
"The first 20 minutes was the foundation. England had a six-day turnaround which is tough and we wanted to take advantage of that and we certainly did."