The Magpies boss said: "I've been pleased with how they've integrated.
"I had concerns because when you're bringing in foreign players, there's time for settling in.
"But I believe the North East is much easier to settle into. It's a warm place, even for myself - and I know I wasn't particularly loved when I came here.
"I can think of players at London clubs - it's much more difficult there.
"People are colder and harsher. The environment is tougher for them."