I have put together some interesting statistics from the OECD, Aikima, Statistics Canada and the Australian Bureau of Statistics to compare broadband in Canada and Australia. Given the similarities (apart from the Big Mac Index purchasing power parity indicator), there is plenty of reason to argue that 'competition' or lack thereof has not been a significant factor in the differences in broadband adoption and take-up.
Click on the picture below to see the table.
Click on the picture below to see the table.