that's probably fast enough for most purposes
There is one major problem with this statement that I saw summed up in a comment on this article pretty well:
"1925: Here's our new plan for the Sydney Harbour Bridge. It'll be a bit cheaper and we'll finish it sooner. And 2 lanes will be plenty..."
Going cheap on the NBN is just another case of a political party fucking things up for future generations for short term political gain (i.e. a better bottom line in their budget). Their justification being that the previous government forced their hand into doing so by economic mis-management is cop out at best.