My local exchange was 21CN enabled last year and some BT retail lines upgraded before Christmas.
Mine wasn't though and, according to BT Retail live chat, ", the exchange has been upgraded to faster broadband maximum up to 20mbps however more switches are required to be installed to enable all of our customers in that area receive up to that speed. The engineers are working on it . Although, the time scale is yet to be confirmed, as it as we get any update, you'll automatically get to know about it"
Does this sound right to anyone?