I am quite happy with my ADSL2.
I agree and I would suggest that 15-24 Mbps ADSL2+ is quite adequate for most people.
A problem many (myself included) are currently experiencing is network congestion during peak times (~5pm to ~9pm). Line speeds plummet to 25% or less of what they should be because there are simply too many people doing too much downloading for the network of routers and servers that make up the internet to handle. This is a worldwide problem and has nothing to do with the copper wire technology, and a shiny new blue fiber optic cable won't fix this, in fact the NBN will probably exacerbate the problem unless all of the exchanges are massively upgraded to accommodate the increased demand. I wonder if upgrading all of the exchanges was factored in to the NBN plan?
I also wonder how well the critical fiber optic connections in the underground pits will stand up to our storms and deluges over time.