The announcement that the exchange has gone live doesnt mean that ALL CABs have.
The CABs seem to be opened up gradually - presumably to manage the numbers of installs to be done as well as completing the CAB installation, fibre installation etc.
It certainly isnt a case that a switch is thrown and a whole exchange has FTTC!
Ex <n>ildram , been to SKY MAX - 15,225 Download
BE Unlimited - 21,000 Download 1,200 Upload ON THE LINE THAT SKY COULD ONLY PROVIDE 15,255 DOWN AND 800 UP ON!!!,
Moved house, now BE Unlimited 6,500 Down, 1Mb/s up - gutted!
FTTC Cab installation commenced 12th April - expect full 80 / 20 - bye bye BE, hello BT Infinity soon!