Hopefully I can be of some help. I applied for my de facto visa on the very last day of my working holiday visa. I arrived in Australia on 25th June 2010 and applied on 24th June 2011. I had previously lived with my partner for a short time before we moved to Australia but we had no proof of this so we were relying totally on the time we lived together in Australia. My visa was granted in February 2012, no questions asked.