Decided to look at the first season that players currently involved with the Portuguese National Team made their "breakthrough" season (10 league games) with Sporting... Jose Fonte, Beto, Silvestre Varela, and Rui Fonte never managed to play ten games for Sporting before being papped out. Cristiano Ronaldo was 17 Ricardo Querasma and Joao Moutinho were 18
Rui Patricio, Nani and Adrien Silva were 19 Daniel Carrico and Miguel Veloso were 20 Cedric Soares, William Carvalho, Joao Mario and Danny were 21 (Danny played 9 games before January then was sold off to Dynamo Moscow)
So taking away Ronaldo, Querasma and Moutinho, who were all exceptional talents, he's on course. If he played ten games next season he'll be starting the season at 20 years old same as, or younger than, six current Portuguese internationals. Everyone needs to calm the f**k down.