Paul Lambert admits it takes time for new foreign signings to adapt - but he's been thrilled with the speed at which his newboys have embraced the intense claret and blue culture.
Lambert plucked Jores Okore, Nicklas Helenius, Leandro Bacuna, Antonio Luna and Aleksandar Tonev from abroad and the boss accepts there can be a "culture shock".
But he's been delighted with what he's seen from his recruits on the pitch - and their efforts to integrate within the group off it too.
He believes there are all ready for the cut-and-thrust of the Barclays Premier League when it begins on Saturday against Arsenal.
But, importantly, he thinks they will grow in stature as the season progresses.
He said: "Any player you bring in, you're hoping they can go and do something. That's what we want so let's see. Now the season is upon us.
"There's a great saying - the proof is in the pudding. Now you have to go and prove yourself.
"We did business early-on. One of the reasons we did it was to get the new lads to know their new team-mates, the new culture and the way it is here.
"I am pretty sure if you asked any of them, it would have been a culture shock with the intensity in which we play but they have adapted to it.
"That was the big thing - to get them into our way of thinking in terms of what we are trying to do.
"Any foreign lads know they have to adapt. They have to adapt to our culture and the way we think. If you do that, it's half the battle.
"They have all been great. Now let's see how they do.
"At this minute, I am happy with where we are and the shape we are in.
"The new lads will also learn as they go along. But they have been with us long enough to know this is big time football for us.
"We will go to a stadium on Saturday which is fantastic and I'm sure they will have seen it on TV in their respective countries but now they are here, they have earned the right to be here. They have to prove it.
"It won't be an overnight thing that clicks into place.
"We will have to persevere with everything. But the lads have done great allied to the ones who were already here. They all know they have to hit the ground running.
"The new ones will adapt quickly because they will see what this level is like."
Lambert is happy with the short-term but he still has one eye on the long-term plans of building the football club for the future.
He added: "It's a long process. It will be a right few years this.
"Everyone wants instant success which you try and give them but it's not always possible at certain times because of the way we are doing it in building the football club by making it sustainable.
"But we are backed by a brilliant crowd. The great thing at the minute is that everyone is in it together. You have to keep that all season."
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