Mine is Infinity 2 from BT with a speed of upto 76 meg....I live about 20ft away from the cable cabinet and that is about 200ft away from the exchange
I get average 35-45 meg
Contacted BT to complain, they looked into it agreed that the speed was well down on what is advertised and cut my monthly bill
I have the mobile/broadband/landline package from them and FreeSat for the TV
I shifted from Sky to BT and even with the occasional hassle from BT, I am still saving well over £120 a month, so the occasional dropout is acceptable, not happy but acceptable