One of the unknowns for the All Blacks heading into this year was the effect the loss of 800-plus caps of experience would have on the team.
The departures of Richie McCaw, Conrad Smith, Dan Carter, Ma'a Nonu, Keven Mealamu and Tony Woodcock were always going to leave large holes, and yet, instead of the team being deficient in that area, it has grown as a result - the leadership of Kieran Read as captain and Ben Smith as vice-captain perhaps being better and more inclusive than expected.
Certainly, a winning team is a happy team, and the All Blacks qualify in both areas. Without getting too bogged down in focus-group speak, it's a virtuous circle of mutual support which appears to be getting the best out of every individual.
Apart from the All Blacks' high-tempo, high-skills based game which appears to have gone to a new level and will be tested to the limit by the Argentine pack at Waikato Stadium, so has the sense of the collective being greater than the sum of its parts.
"There's a lot of improvement to come because we've just come together," All Blacks coach Steve Hansen said. "We have definitely improved in our leadership. This young group have really taken the bull by the horns in this area. It's a collective unit operating very, very well with a lot of flexible thinking, and [they] are loving the challenge.