Has TVNZ flicked the switch for HD on playback with a good internet connection?

I ask this because I am watching through the new Windows 10 app via a laptop and find the quality of shows in HD (I can tell when it is)
I have VDSL  up where I am staying at the moment, If so then good on them as I am watching a few online only BBC series not on Netflix nor BBC iPlayer and find the TVNZ on demand content more appealing to use on shows I cant DNS elsewhere.