@dapples That is actually quite interesting. I have both a 2degrees and Quic connection (seperate ONT's) and they both perform about the same. There must be a bigger problem going on.
I do understand though that 2degrees support is horrific to get hold of currently but I am sure that @Sounddude would have loved to investigate. Your speeds are quite a bit of a difference too making me think there is something on their end limiting some of these connections.
I remember that 2degrees (on their original network) would limit connections to a max of 100/100Mbit until provisioning had completed - has this rule been passed through to Vocus perhaps?