Are you sure it is not just a restriction imposed on your supplier by TeleCONica?
It is apparently the case that they only license other providers to use lower speeds, thereby giving them the uncompetitive "edge"
I have 10Megs download - measures in regularly at somewhere between 8 and 9
You saves your money and takes your choice!
I checked this with UK Telecom and they absolutely refute any suggestion that Telefonica may not be playing fair. Since my first posting I have been obtaining between 550 and 850 KBPS consistently, which is just acceptable. UK Telecom continue to be extremely supportive. They suggested re-booting the router if it slowed down. This works. You are lucky to have 8 MBPS here, I can't get more than 4 back in the UK. I plan to check my neighbours Telefonica service for speed but expect this to be the same as mine.
Are you surprised??
It is the sad case here that despite regulation and considerable fines, TeleCONica still hold a monopoly over telecoms. Any third party reseller is simply at their mercy and there is precious little that can be done.
The fact that a 10Meg service would appear to be available in PS is a strong indicator that, even though further from the exchange, a service approaching 3 or even 6Megs is readilly available in LG, albeit directly from source rather than third parties.
The islands are full of stories of people who leave TeleCONica for other providers and eventually end up back where they started - either because of low adsl speeds, poor repair times or similar.
I hate the situation as much or more than you, but this is not the UK, and TeleCONica are well known for underhand practices.
Obviously you have a choice, but I do suggest you contact TeleCONica out of nothing more than curiosity to see what speeds they will offer you on your line and number......
As a PS, there is a website somewhere that you can put your telephone number into and see what speed adsl is offered for that specific line. I am trying to find the link and will post it if I am succesful, unless anyone else is aware of it???