The 25-year-old Dutchman has impressed considerably since moving to St James' Park, despite having big shoes to fill in the shape of Mathieu Debuchy, who last summer joined Arsenal after leaving the Magpies.
And Carver has sung Janmaat's praises, lauding him for how quickly he has adapted to English football.
In fact, so seamless has Janmaat's switch been that Carver feels it is a feat even Yohan Cabaye, one of Newcastle's most influential players in recent years, could not even manage.
“I think out of every player we have brought in only Daryl Janmaat has hit the ground running," the Newcastle boss told reporters.
“Daryl came in from Dutch football and hit the ground running.
“There’s players in the past that have taken a lot longer. I remember when Yohan Cabaye first came here, Yoan Gouffran - a lot of players have taken time to adapt."
Newcastle travel to Everton in the Premier League on Sunday afternoon, where boss Carver says all the pressure will be on the hosts at Goodison Park.
The Magpies, however, have won just twice in their last 10 league games and will only be four points above the Toffees should Roberto Martinez's side beat them on Merseyside.
If there is anyone Newcastle can rely on to produce a good performance, though, it is Janmaat - one of their best signings of recent times.