I'm completely bemused by that as the average performance seen on LLU seems to disagree. According to Ofcom then 17% of people will have a loop length sub 3km and a line attenuation under 35-40.
The line stats, etc, that I've seen disagree with that though perhaps I haven't seen the best subset.
Ah well Ofcom have better data than I do you'd hope so I'll have to concede that one
Amusingly the loudest complainer of ADSL performance here is one of that 17% but has a pants line
On the upside the majority of the UK can get 4Mbit+ according to BT, which is 'decent' performance in my opinion, contrary to what some might say.