Ferguson can see Norwich now improving under manager Chris Hughton after an unsteady season start.
He told manutd.com: "I've got a lot of respect for Chris Hughton. I think he's done a fantastic job at Birmingham and Newcastle and, with that performance against Arsenal, you think they've maybe turned the corner in terms of Chris' introduction there as manager.
"It's always the same when a manager goes to a new club. There's a different way of training, there are different ideas about players and maybe Chris is getting it together now. I hope not when it comes to our game, mind you! But that performance against Arsenal was very good."