Well - that 51-49 was overly positive for the ALP - but there is a massive caveat on pretty much all polling during this race. There are a LOT of people on holiday still and there's a reason why polling stops in Australia in mid-December and doesn't start up until late January. Yes, there's not much usually going on, but at the same time there aren't enough people at home and you can't easily adjust the data adequately.
I've just been wondering how "summer school break" works down under ? Here in Europe, school stops for approximately two months, July and August. Do your schools close January and February ? And for businesses ?