The 18-year-old winger is one of the success stories of United's season so far.
Outstanding on the club's pre-season tour, Januzaj made his debut in the Community Shield but was then forced to wait for a significant chance to impress in the Premier League.
When it was offered by manager David Moyes immediately before the international break, Januzaj took it with both hands, scoring the two goals at Sunderland that overturned the hosts' early lead and allowed United to claim a precious victory.
He maintained that form against Southampton, when he provided the sensational through ball to Wayne Rooney that eventually led to Robin van Persie's goal.
It has led to Januzaj becoming one of the most talked-about young players in the game, with particular focus on which international team he is going to commit to.
For Giggs, who caught the eye in equally startling fashion when he made his breakthrough in 1991, the key for Januzaj now is not to change.
"I got told just to carry on doing what I had been doing in the youth team and the reserves because that is what had got me into the first team," said Giggs.
"Adnan is a great lad. He wants to learn and he wants to get better.
"That is great to see.
"He is a talent. As far as I am concerned he is at the right place, so hopefully we can see that talent develop."
Giggs realises Januzaj should not be saddled with too much expectation at present.
For talent as raw as his can sometimes lose its edge.
"He is doing OK at the moment. The advice comes when things aren't going well for him," said Giggs.
"Young players have dips in form. That is inevitable.
"At the moment you just let him enjoy it because everyone is enjoying seeing what he has done in the last couple of games for United."
Amid all the chatter has been compliments from his manager and a new five-year contract, underlining the faith United have in him.
"Having his future settled will help," said Giggs.
"Obviously he can forget about that now and just enjoy his football.
"He has enjoyed learning and training with the first team, just like I did at the same age.
"Not only does he learn so much, it is great for the other players to see someone like that. It gives you a lift as well."