It's not even rural areas that suck, I'm in zone 4 London, so pretty suburban, and I get about 7Mbps down/0.5Mbps up! The FTTC roll-out said it was planned for my cabinet, not just says it's not.
From personal experience, it does work. You want things to get to the point where some senior executive at BT says "can you sort this cabinet out" because that's easier than dealing with all the noise from residents, councillors and MPs. The squeaky wheel gets the grease.
I guess it's just a dice roll. /shrug