> They can't sell a 1gig plan without a gig of backhaul which current costs more than $1,400 a month.
Not sure where the $1,400 figure comes from. CVC is currently $17.50/Mbps, so $17.50 * 1000 = $17,500. If you have a 1:20 contention ratio that is $875 per customer in CVC wholesale fees. An RSP will need to have significantly more than 1Gbps to prevent congestion turning into contention.
What I would like to see is NBNCo remove speed tiers. The reality is at that at the moment for many providers congestion during peak periods means for the 14% on 100Mbps their speeds drop significantly making it hard to justify paying a premium for faster speeds.