It ranked Optus the best followed by TPG and iiNet.
Telstra ranked 6th of the major ISPs.
Australia (purple line) also trails the countries with the best ISP results, as indicated in this graphic. Note that this graphic does not include all countries.
The Netflix ISP Speed Index is a measure of prime time Netflix performance on particular ISPs (internet service providers) around the globe, and not a measure of overall performance for other services/data that may travel across the specific ISP network.