Tew said the boys in black were emotional after the win - becoming the first nation to win back-to-back world cups, and to take the trophy home for the third time.
"There was a lot of emotion in the shed, and clearly there are a big bunch of players who are leaving us now who have contributed so much to that jersey, so that would have brugeen a bitter sweet kind of moment I'm sure.
"But they'll have had 24 hours to reflect before they get on the plane and I guess as I have, over the last 20 or so hours on a plane you get a chance to think of exactly what's been achieved."
New Zealand rugby had "a lot to celebrate" this year, Tew said and not just the Rugby World Cup win.
"We've got a bunch of players, including our women's sevens and our Black Ferns who've had an exceedingly good year, so we've got a lot to celebrate when we get together for our own awards later in the year, and I guess we'll all go away and have a summer break and reflect with some satisfaction."
Tew couldn't shed any light on whether star skipper Richie McCaw would hang up his shirt after the celebrations are over.
McCaw is expected to hang up his number seven jersey, but his post match speech at Twickenham hinted that his love for the game isn't over yet.
"I think he's still keeping his cards very close to his chest, so we'll let him make those decisions and announce them when he's ready," Tew said.
