Chiefs coach Dave Rennie, unhappy for 50 minutes of a rusty performance by his team on Friday night at Waikato Stadium which nevertheless produced a 34-22 win, admitted Tameifuna was a "hell of a weapon" to bring into a match.
Rennie revealed the 21-year-old Tameifuna had been dedicating himself to his craft over the past four weeks in a regime which included working out twice a day.
"He was pretty keen to go to Tonga for a week in that first part [of the break]," Rennie said of Tameifuna. "It was discouraged and to his credit he decided to stay and work hard. A lot of the boys went away from Hamilton but he hung around and so the trainers got double sessions with him every day. He's worked really hard, he's worked hard all year but he's had a couple of setbacks with injury which have slowed things down.
"He's an absolute rock at scrum time and he's getting around the field. He makes an impact with the ball and he's got the ability to put a few big shots in defensively. We're really happy with Tama, he's made some big shifts."
Tameifuna's greatest attribute is that he simply can't be moved in the scrum. Rennie said he was a rock but he must seem more like a cliff face to opponents. Ben Franks, an All Black who had been playing well, had no answer to the bigger man's power.
Tameifuna also has surprising pace and agility, qualities which help make sense of the fact that he used to be a halfback.
Brought into the All Blacks' environment last year but without playing a test, Tameifuna will still be on Steve Hansen's radar.
His match-up against Wyatt Crockett and Owen Franks next week in Christchurch will be a blockbuster. The Crusaders would do well to prepare for a big freeze.