What we have in New Zealand, euphemistically referred to as broadband, is absolute crap, speed-wise, so that could indeed be implicated.
The Australian figures seem high, when I compare them to my guesstimate of local output. I suppose it might be said that the more the better, for my application?
I have the bridge piles and bearers in, but the decking will be a little later. A bridge over no water! Still, it did seem essential to get that in before laying out any planned liner.