I suspect, being as our delicious connections are so new, that no one has yet tried to move house with a FTTC connection.. And I am going to be the guinea pig.. I know it's bizarre, considering we only got connected in March, but such is how these things go. Fortunately, new house can get FTTC. Sadly the speed estimate on the checker is about half our current sync (14 down, and 5 up), but better than the ADSL estimate of 1 - 4Mbps down..
On the plus side, we are moving to another town, so a new line will be ordered before we take occupation and hopefully we'll only have a day or 2 without a connection..