Take everything on these forums with a grain of salt. Probs was just a pretentious douche saying that so they seem smarter for attending USyd/UNSW. Prospective employers do take into account the university, but it doesn't guarantee/prevent you from getting a spot. A lot of people that attend UNSW/USyd, and indeed, a lot of universities, don't have any practical experience/are just 'textbook' smart - employers look for characteristics which you can't learn from a textbook - because let's face it, knowledge can be learned over time, but certain skills can't, or are very difficult to learn e.g. communication/interpersonal/leadership.
TLDR; go to whatever university you want/can get into - it doesn't matter where you go. A lot of people that get spat out from UNSW/USyd aren't really employable because they've been sheltered all their life and spoon-fed information (not to say they didn't work hard or that all of the people that attend these universities are like that, of course), and haven't really developed other skills which are critical to employability. Make sure you have these skills to have an advantage over graduates from these 'superior' universities and then it won't really matter where you attended university.