The 28-year-old was brought to Italian football as a duck to water, score 12 goals and offer two assists in his 32 games in all competitions.
McTominay was the key to Napoli, because they have three points on the current Series A holders Inter Milan in the race for the title of this season.
Conte, who, like the Scotland International, came to the club last summer, has revealed what he believes in the reason behind his fine form.
“I think Mctominay is stronger today than when he arrived from United. He has grown a lot here,” he said reporters.
Scott Mctominay Loving Life as Napoli Lead Race for Serie A Title
“I think he himself feels stronger, with more knowledge, that he also reaches an important phase of his age to understand where to go in his career, because he has been in the middle so far.
“He has never had a leading role at United that we have given him here instead, he has grown a lot to work, today he is complete.
“But everyone has had the improvement he has had, otherwise it will be difficult to explain why we have 74 points today.”