Secrecy breeds incompetence
The total secrecy surrounding the NBN is not good for anyone except the bureaucrats. Telstra should have some good fault data available, and the NBN and the public should both have access to it. Obviously some lines are good, some are a disaster. Some of the gel joints have been fixed many have not. But what is needed to make sense of any of this is real numbers, not hearsay and speculation.
The NBN thinks that it is be clever by being secretive. But in fact it is probably just hiding bad decisions that will bite us later. By "us" I do not mean the NBN executives who will have moved on by then. So perhaps being secretive is a good policy.