In the uk we can get upto 150Mb s but that's not what your home network speed is about
No I am with you there, internal network connections between devices in the same network depend on your routers Wifi capabilities, not your ISP's Mbps delivery. That is good for things like iTunes media Homesharing, but any external connection will be limited to what the ISP is serving up to your home.
Yes, you can get up to 150Mbps - but what do you actually get and pay for? That is about the limit here in Sweden as well, but I only get 60Mbps in my home.
Virgin media provide the 152Mbs service and you get what you pay for as its not over a copper line like the other services.