Melbourne: Extremely unlikely
Los Angeles and Melbourne have no direct connections on the evening of 20 Nov, but there are three separate direct flights arriving in the span of 90min the very next day. It would be unlikely for the start to be scheduled on the 20th and not the 21st if Melbourne were the first destination.
You're right, Neobie... it was local Sydney stuff. But, as I posted elsewhere:
I have it on very good authority that tomorrow they are going to be in Melbourne.
Seven Network and some US TV people were timing getting on foot from Southern Cross to Southbank area late last week. This could not be a coincidence, surely.
My tip... be hanging out about 9am at Eureka 88 and the Skydeck. You may see some cameras.