That is correct, we have nothing that compares to BT here in the states. In the US, there is very little regulation on the cable networks, who choose not to lease out their networks like BT is forced to in the UK. Here, each ISP has to build their own network if they want to deliver service, causing there to be generally no more than two service providers in most cities/towns. Some ISPs use fiber optic cable, but the cost of entry is too high to push down prices or increase speeds, meaning that fiber isn’t much faster than cable, and costs about the same as well. The government is unlikely to ever level the playing field due to the lobbying of rich cable companies, so our only hope of competition is Google, who is rolling out their 1Gbps fiber service in some cities. Since they have to lay all the cable (at a cost of billions) they are rolling out very slowly, however, and currently only provide service in a single city. It seems like we have faster service available to us, even if it costs far more, though. You say that the max internet speeds in the UK are a bit more than 100 Mbps. In the US, we sometimes have speeds up to ~200 Mbps, though we pay through the nose for it at around $200 a month.
This is what design is all about. Designers take others’ ideas, combine them, and make them better. That’s why Android includes many aspects of WP, yet is still very different. You can’t honestly tell me that Android 4.x looks and feels identical to WP8/7. Look at the textures, information density, etc.