New Zealand crushed a disjointed Wallabies 38-7 in Melbourne on Saturday in another statement performance, which followed impressive victories over world champions South Africa and an improving Argentina.
Once again, they were patient in defence, retained the ball well, were dominant in the scrum and devastating on the break, crossing for six tries in front of nearly 84,0000 fans.
They built their lead with three tries before the half and added another three in a stunning eight-minute second-half spell to retain the Rugby Championship and trans-Tasman Bledisloe Cup.
"The manner of it is pretty pleasing. We got told we hadn't been put under pressure in the first two games and I don't think that was correct," said All Blacks coach Foster.
"We were put under a lot of pressure (by Australia), but our responses and how we're adapting to that was pleasing."
"To lock away a couple of trophies is pretty special," he added.
It is a remarkable turnaround from a side that had one of the worst years in their history in 2022, winning just eight of 13 Tests and setting firsts by losing a home series against Ireland and going down on home soil against Argentina.
Foster, who will be axed after the World Cup in favour of Scott Robertson regardless of what happens, warned there was more to come.
"We're trying to build something that gets us where we want to be," he said.
"We've made the point earlier that we feel the best way to prepare for the big stage is to prepare for the big stage every week. And that's what we've had to learn.
"We know that we had some growing up to do as a team, coming into this year. And so far we've taken three pretty strong steps forward, which we're pretty proud of.
"But I'm not sure it's quite enough just yet."
Foster has fielded his strongest starting XV for the last two Tests.
But he could be tempted to mix it up for the reverse clash against the Wallabies in Dunedin on August 5th - their last home match before departing for the September-October World Cup.
"We've been able to build some combinations and give opportunities to new people and that's going to make life interesting in a week or two," he admitted.