So finally have 1gigabit symmetrical up and running.
Main problems I have noticed:
1) My (admittedly, cheapo 5400rpm) hard drives struggle to keep up with downloads (especially torrents which are more random writes than a sequential download). SSD is fine though, but considering you can fill a 250GB SSD in about half an hour on this connection, I don't have pockets big enough to change all my disk storage to SSD.
2) Wifi is way off. I'm not using the hyperhub wifi (which is rubbish and only 2.4GHz) but instead a 450mbit/sec 802.11n 5GHz router. Even right next to the router, it maxes out at less than 200mbit/sec
Overall, it's a bit pointless past 100meg at the moment. Most sites can't keep up with it and my own hardware is the big bottleneck. I think BT with FTTC and vectoring is going to be enough for now.