Practically the whole of Cornwall's exchanges have been upgraded to fibre and Talk Talk have recently been in touch with me to sign up to it. When I first heard of it I couldn't wait for it to happen, but then looked at what I have already and decided to stay as I am.
A fibre upgrade would, according to TT, give me 'up to 15.2 Mbps' and would involve a new 18 month contract at £10 per month and a new and dearer 'Plus' broadband package. My exchange has already been upgraded and since then my broadband speed has more than doubled to just over 7 Mbps. This speed I find adequate for my purposes so until TT start putting the squeeze on my bandwidth I'll leave well alone.
One never knows but TT could come forward with a better and more tempting deal that might cause me to change. I live in hope. :o) TC.