Wales caretaker coach Rob Howley said Saturday's Six Nations title triumph topped last year's Grand Slam success.
The 30-3 victory over England in Cardiff secured the crown for Wales - their first back-to-back championships in 34 years - while they denied England of securing their first Grand Slam since 2003.
"This is better than the Grand Slam last year," revealed Howley. "We were outstanding. They have shown great fortitude and they outclassed England."
Wales endured an eight-game losing streak, after last year's Grand Slam triumph, but Howley said they always believed they would turn the corner.
"We kept on sending the message that good teams don't become bad teams overnight," he explained. "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."