It's more than that, though: if they don't get that bit right against Argentina and South Africa they can forget about winning.
So to see the Wallaby scrum reduced to rubble brought as much relief as it did elation. The All Blacks have secretly fancied the new laws are right up their boulevard - that their explosive strength and superior technique will be consistently rewarded under the law.
There wasn't much sign of that last week, but with most of the glitches worked out of the system, they set a benchmark for the weeks ahead.
"I think tonight was a lot better and we scrummaged better as a unit and we got some rewards," was Tony Woodcock's succinct assessment.
His role in that dominant effort was significant and fitting on the night he became the fourth All Black centurion. It was vintage Woodcock - dynamic and ruthless - yet typically, he was keen for the spotlight to be somewhere else in the aftermath.
"I think it was about eight years ago that Shag said to me if you do things right you will be a 100-test All Black. I didn't believe him," he said about whether he had taken stock of his achievements.
When the All Blacks reconvene this Sunday, Woodcock will be his usual understated self - the events of Wellington long forgotten.
All he'll be thinking about is putting in a better shift than the last and hoping his teammates do the same.
To do that, there will need to be more focus on the breakdown as it took the All Blacks half an hour to match the intensity and aggression of the Wallabies.
And there will also be a desire to sharpen their attacking raids - while they impressed in the way they used the ball, there were still points squandered and they are striving for the perfect performance after all.