Where we live, in the sticks between Prestwood and Hughenden, not too far from High Wycombe, there is no chance of those speeds - the nearest cable is nearly 1000m away.
Until recently our top speed, at about 3am in the morning, was about 1Mbps, during the day as low as 0.3Mbps. Then they installed a new fibre cabinet and our speed increased immensely.
We are on TalkTalk and routinely get 25-28Mbps. Our neighbours are on Sky and BT and get slightly lower (about 20-23Mbps)
Where we live is idyllic - but technology is something you can't worry about. Mobile phone is only useable in one room (assuming on the correct carrier - EE, 3 signals are non-existent), have to use Satellite tv and no DAB signal.