Also worth noting that other providers using exactly the same technology use a headline rate of "upto" 24 mbps. BT at least use a more achievable limit of 20 meg.

Ofcom's recent report in conjunction with Samknows can be found here - http://www.ofcom.org.uk/research/telecoms/reports/broadband_speeds/broadband_speeds/ , 3 % of connections can get "upto" 20 meg, only 1 % get "upto" 24 meg.