NTL could give every household their own private 1000mbit line for all I care, as soon as you left the NTL network the crap peering would make it useless.
Where now for UK Cable ?
Nowhere unless their links to other networks are massively expanded, 10 meg unlimited will probably make a bad situation into a catastrophe
The DSL connections I have used on this area stay at the same rate to all destinations at all times of the day, NTL's is awful at night, great during the day.