The Egyptian has enjoyed an impressive start to his Reds career after arriving from AS Roma in June, scoring three goals in his first five appearances for the club.
Salah's performances since making the switch have seen him nominated for August's Premier League Player of the Month award alongside fellow winger Sadio Mane.
But for Mignolet this has come as no shock, with the Belgian citing his colleague's quality and previous experience of life in England as evidence he was always going to slot seamlessly into Liverpool's attack.
The goalkeeper said: "He had his time already with Chelsea and knows what the Premier League is about.
"He's a quick player but at the same time he's also very strong on his feet as well, so he can win his duels and cope with the physicality of the league.
"Nobody really doubted he would deal with that, he had a really good time with Roma and has come back a very confident player.
"Let's hope he can continue the way he's doing at the moment for us because those individual players can make a difference and change games for us."
Jürgen Klopp's team have netted 14 goals in their first five games of the new season, thanks in no small part to the contributions of Salah and Mane.
Mignolet heralded the sheer pace the pair possess as a key factor in the Reds' threat going forward, but he was also keen to highlight the effort they put into the defensive side of the game.
He added: "[Salah] is very important for us because, as with Sadio, he's got that speed.
"Speed is something you can't train, you have to have it to stretch the opponent, to run into the space behind and to make defenders wary of the space they give away.
"They've got that so we can use that, not only on the break but also in the game.
"What's special about them too is that they work hard in coming back and helping us defend, that's sometimes more important for a winger.
"Of course, everybody wants to score goals and everybody wants to create chances, but you also have to be part of a solid unit to defend. And they do that so you're always grateful for that."