No doubt data use will only increase, link below seems relevent, Telstra and Exetel have signed a $40m deal over 2 years, doest say for how much bandwidth, but reading between the lines, its 67Mbps for 10,000 customers which means they are at around 670Gbps, if the deal is to service all that and leave some room for growth, maybe its 1Tbps.
$40m over 2 years, is 1.666m per month, so $1.66 per mbps per month, which is in the same ballpark as superloops $1.11 per mbps per month. The exetel deal is 10x bigger than superloops, so it should be cheaper, but Telstra is famously expensive. It does look like we gave Superloop a good deal, but not embarrassingly so.