It is interesting seeing differences in speeds between US and UK.
In UK, fibre broadband is (as another poster said earlier) is not true broadband for most fibre users but fibre up to local panels, and cables for last few hundred metres or so.
The reason our system is like that is a legacy of our old national telecomms system dating back to the days when all telecomms was supplied by one company (British Telecoms) who provided the infrastructure and the phone service.
Eventually, this was denationalised, splitting up supply of phone service from the network managenent.
There are a number of broadband service suppliers but they have to pay BT who still run the network for access to the neteork.
The upshot is that broadband is widespread and generally prices are (as far as I can tell) very competitive compared to US costs.
Unfortunately, the side effect is that majority of UK users get fibre/cable service, and by nature of design, it requires a massive upgrade to all the local supply systems to get true fibre right up to individual houses.
In the US, the telecomm structure was not so centralised, and some areas are covered more by one company than another.
The plus side is that upgrading US to full fibre was easier but competition for services lower as often no real alternative to the local main supplier.
The upshot is US have a more modern network but poorer service (I guess that is not so true now though).
So it is difficult to compare broadband just on speed.
For example, due to the competition for services in UK (it is easy to switch supplier), virtually all contracts are for unlimited broadband in terms of data, and often free uk landline calls as well. The average price is around £30 ($42) per month whereas seems average US prices are around $60 per month.
Bear in mind, UK prices include 20% tax as well compared with much lower US Sales Tax.
However, prices in US are more regional dependent, but in UK virtually region independent (albeit some remote rural areas are poorly served and are still on the old cable system).
In the end, I think it will be at least a decade before UK's broadband infrastructure will be true fibre. The problem is service suppliers have to indirectly fund the upgrades and most domestic users just do not really want to pay for the high extra costs, and indeed are not even aware that much higher speeds are possible. The truth is the hybrid fibre is fast enough for most domestic users.