So it it fair to say the Hawke's Bay fullback was gobsmacked to hear his name read out among the 26-man squad named for three tests next month against Ireland and Wales.
The 21-year-old was one of four newcomers, alongside Manawatu first five-eighth Aaron Cruden, Auckland second five-eighth Benson Stanley and Wellington loose forward Victor Vito.
Dagg told NZPA he had absolutely no expectations of making the squad despite strong and consistent form for a poor Highlanders team in this year's Super 14 competition.
In Gisborne at the home of girlfriend Daisy Aitken's parents and in the company of his own parents, Dagg was flabbergasted at his selection.
Beforehand, he had not even entertained the prospect of gaining promotion to the national side.
"I didn't think anything about it. I thought I'd have to wait my turn, but obviously it's come.
"I couldn't believe it. Everyone was yahooing and everything. I had my hoodie up and was trying to stay grounded. I'm over the moon and it still hasn't hit me yet.
"It is a very special moment and one I will cherish for a long time."
Dagg has showcased his silky running skills for the past two seasons with the Highlanders and he thinks he broadened his game this year when he took on the goalkicking duties.
"I was reasonably happy with my form, and I was pretty happy with the role I took on with the goalkicking. It was a good opportunity.
"It was one of those seasons when nothing clicked," he said of the Highlanders' 12th placing.
"I thought as individuals that we had to stand up and play our own game and hopefully help the team out."
Dagg certainly did that, with a series of quality performances to catch the eyes of the All Blacks selectors.
Dagg made a concerted effort to make an impact this season, to go searching for work and making sure he was positioned to support the ball carrier.
"I tried to stay in the game as much as possible, get in the game early and get my hands on the ball. I also worked on my defence and I think it paid off."
He knows exactly what he wants to do when the All Blacks assemble ahead of their first match, against Ireland at New Plymouth on June 12.
He faces quality opposition in Mils Muliaina and Cory Jane for the No 15 jersey and knows he may have to bide his time and hope for a start off the reserves bench.
"It's going to be tough but if my opportunity comes I will step up and do my best.
"I just have to go into camp and work hard, stay grounded and try and get a test jersey."
