Make sure you don't mention in NZ that you are visa running, I had problems, experienced whole border control scenario=) thanks god i had some 'Tourist Plan" with the accommodation and buses booked, otherwise they would not let me in=(
Basically the grant was emailed same day I left OZ, they want u to be away for 3 working days, fair enough, i could come back same day though.
Returning to Oz was so smooth, no questions, no printed grants, etc ... they got it all on the system, just passport and welcome to straya!
Same thing for people to coming here on a tourist visa while awaiting for their grant, i believe it all depends on the visa officer at the airport, but you have full right to come as tourist, nothing wrong with that. Again without all printed evidence and stuff, its 2015, they got all in their computers same as u got ur online banking n stuff.
Good luck to all who are still in the line! its all like an exam, you stress about it, but at the end its so easy!!! (but pricey!=)