Rooney believes the actions of Carrick and his staff away from the first team have also contributed to the sense the club is beginning to move back to what made them so successful in years gone by.
“There’s a calmness about the place,” Rooney added.
“I was watching the under-16s on Saturday morning and they were all there again. Michael Carrick was there, Steve Holland, Jason Wilcox, all the coaches were there and so on, which you’ve heard me talking about a lot, that connection with the academy.
“What I saw, not just from Michael, but the other coaches, Johnny Evans as well, is a real calmness and a belief.
“Michael told me how good the players were and he felt he had to stop the session early because they were that good and he wanted to bottle it up.
“And that’s proven today. An absolute incredible performance.”
A jubilant away end sang, presumably tongue in cheek, about winning the league and while that might be out of reach this season, winning the title was the norm under Sir Alex Ferguson.
United won 13 league titles with the Scot at the helm, with Rooney a key part of five of those successes.
“You go back to the United DNA and United as a club and things you want to see,” he added.
“I was there for 13 years, so [there are] things you want to see at that football club which I haven’t seen there for a long time. And I thought it was absolutely brilliant.
“You’ve got all the coaching staff all there watching the under-18s play. And then again, on a Saturday morning, they’re all there watching the under-16s play after the training session.
“These are all things which used to happen in the past and it makes a big difference. In my eyes they have taken a step towards getting the club back a little bit closer to where they used to be when the club was successful.
“I know how Michael works and I knew what he could do with this team. I am really pleased with the start he has made because he and his coaches have been criticised as well and have gone and competed with the best teams in the league.”