Grealish started just seven Premier League matches last season.
He looks a player reborn wearing the blue of Everton after starting two of his new team's first three.
As well as two assists in an action-packed display against Wolves, he was denied a goal by Jose Sa while he had 60 touches, made 35 passes and finished the game with a passing accuracy of 91.4%.
The former Aston Villa man also won his side seven free-kicks on his return to the West Midlands.
"He is even better than I thought," said Everton boss David Moyes afterwards.
"He probably needs a bit of love and attention. He needs the games as well.
"Hopefully he starts building on it and he gets even better as the season goes on.
"He is making a big difference. Whether it is his assists, his presence, lots of things.
"So all credit to him. He is playing the minutes he may not have had in recent years.
"You know, he's so good. What Jack gives us is something just on the edge, which, hopefully it's on the edge of creativeness and maybe scoring goals."
Asked about his upturn in form, Moyes replied: "It's nothing to do with me, let me tell you - it's all to do with Jack and his own mentality to be better.
"There's a wee bit to prove, I'm sure - I think we all have. I think in life, you've always got something you have to strive to do.
"And I think Jack wants to show that he's a good player. I think he's showing it at the moment."