Not a lot! (technically not a percentage ;D)
http://www.thinkbroadband.com/news/4580-only-40-of-cabinets-may-get-enabled-in-a-bt-fibre-broadband-area.html?utm_source=twitterfeed&utm_medium=twitter
My FTTC date has been put back at least 3 months.
Nothing new there, then. BT does as BT wants.
There will be technology out that is so much better than fibre by they time they enable my area. Gits.