The soft early efforts in matches have gone and having Kaino and Nonu, two notoriously hard trainers, set the standard is a huge boost. It's probably no coincidence that their involvement in contact for the first time after the team's return from South Africa before the Cheetahs match resulted in one of their team's more intense sessions. On the Thursday before the match, wing Frank Halai was flattened and stayed down for several minutes during a 15-on-15 game notable for its intensity. First-five Simon Hickey limped afterwards, an ice pack on a calf knock.
Kirwan's chopping and changing early this season was an attempt to provide competition for places but it's Kaino and Nonu who have taken it to a new level. The lift in performance of loose forwards Peter Saili and Steven Luatua and midfielder Jackson Willison has been noticeable.
Willison, who will likely return to action from knee and rib problems after next weekend's bye, explained why.
"It's in the midfield but it's also in the whole team where we are getting that competition. It's starting to show at training. The intensity has picked up a bit. It's a healthy feeling because it's leading up to our games and we're starting these games with a bit more intensity."
The Blues have many role models - veteran hooker Keven Mealamu, flanker and captain Luke Braid, experienced lock Tom Donnelly - but it's easy to see how the introduction of Kaino and Nonu have made them exponentially better.
Luatua, 22, is seen as a potential leader but he's still young and Kaino will have taken some of that pressure off his shoulders. Halai, Francis Saili, Charles Piutau, Tevita Li and George Moala are young backs with potential. It's easy to see how a focused and engaged Nonu can push the right buttons for them. Nonu is robust but he is also one of the most skilful in the Blues and All Blacks.
With Kaino and Nonu on board, the Blues are going places.