Ferguson said: "He showed at his age, you don't lose what he's got: passing, vision, and he's still got a good appetite for the game.
"The game needs that. There's plenty of good players in our country. Sometimes we beat ourselves up about the standard but there's plenty of good in it.''
Ferguson felt Newcastle provided his side with a good early test as United opened their Premier League campaign with a victory.
"They got into the Premier League last season by being determined, good work ethic, good unit and we saw that tonight,'' he said. "They were difficult to break down at times.
"We were wasteful with some chances. Dimitar Berbatov could have scored three or four, but his performance was excellent.
"The three points is always important in your first home match. For most of the game we controlled it, we passed the ball well at times. It was a steady performance.''
Scholes felt Manchester United could have scored more but was content with the 3-0 win.
"The most important thing is to win the game,'' Scholes told Sky Sports 1. "Maybe we could have scored more but we'll take a 3-0 win on the first day of the season.
"Newcastle came, set their stall out and defended deep. Once we got the goal we were a constant threat. A lot of teams come here and try to make it difficult. We just had to tire them out as much as we could.
"Second half especially, I really enjoyed that: creating chances, looking like we were going to score whenever we went forward.''
On Giggs' strike, which the Welshman finished following a fine team move, he added: "It was a great goal to watch. We kept the ball well and it was a fantastic goal to start off with."
Newcastle manager Chris Hughton was also happy to praise Giggs and Scholes for their decisive impact on the tie. He said: "It doesn't surprise me that both players are so effective. They have been able to avoid the big injuries and they have also played all their football in top quality teams. They showed so much quality from such an early age."