The Wearsiders moved away from the relegation zone and into 15th after an emphatic 3-0 derby win over rivals Newcastle on Sunday - with the new manager marking every goal with a wild celebration.
|6/1||Sunderland are 6/1 with William Hill to be relegated from the Premier League
"Inside the dressing room and on the training ground it is totally different to what you see on the pitch," Mignolet told reporters.
"When you are winning or have won a game at Newcastle all the emotions come out, that's normal and his celebrations showed his temperament. But inside the dressing room he makes sure everybody knows what their job is.
"He gives us all messages to make sure we all know what we have to do and that's why we were ready to go out and get a result against Newcastle. The manager tries to get us organised before the game."
After celebrating one of the goals against Alan Pardew's side with an emotional embrace with the team, Mignolet believes Di Canio's recent experience as a player helps him to connect with the squad.
He added: "Di Canio is not that old, so he was a player himself not too long ago and likes to be involved with the players, likes to feel part of it.
"It was not easy for him with the noise at St James' to get his messages across, but he also delivers his messages on the training ground to us all so we tend to know what he wants already. He has high expectations of us all."