Sadly this is all quite normal as BT's dates are only rough estimates and tend to shift both backwards and sometimes forwards in time. In other cases some upgrades have been suspended / cancelled completely until other problems can be resolved first and we've seen a few put back by an entire year.
My exchange was enabled back towards the end of 2010 (around Sept-Nov Time, i believe it was one of the first) The original date for me to get FTTC (IE my cab to be upgraded) was if i recall correctly End of December 2010.
That then shifted to Jan 2011, then March 2011, then June 2011, then Sept 2011, and then (spot the patter) the end of December 2011.
It then stated March 2012, and now it says June 2012 on their checker LOL........ A year late, my god i wish i was one of those lucky enough to only have to wait a year extra for the shambolic BT.
BT occasionally mentions these changes specifically but most of the time they happen quietly in the background via a tiny database change. The lesson is, don't allow your expectations to get ahead of reality. Deploying FTTC / FTTP is quite tricky and requires some major work so it's to be expected that many locations will suffer delays.
Major work!!!! Sorry but thats nonsense its a simple job in most cases that doesnt even involve digging up a road or pavement.
Delays like this are practically normal for most ISP / telecoms firms when rolling out new tech.
Its funny, 3G services i remember came to my area around 2 months ahead of when 2 of the 4 mobile providers predicted. I suspect 4G will also get here ahead of schedule. Virgin media (or rather Telewest as it was when my street got that) finished that deployment in my street many years ago 3 weeks ahead of schedule (Now thats what you call major work, having to dig the length of a pavement the entire street and across a road at 2 points).
Then i look at BTs history......
ADSL 2Mb services in this street, 3 months late....
ADSLMAX.... That was 7 months late.....
FTTC....... Who the heck knows how long its gonna take them.
The sad part is history says they were incompetent before, this time they are even worse and for where i live had local authority money for the area deployment already. The fact some of my council tax has probably filled BT pockets and they havent even done 50% of this town with cabinets since end of 2010 is a utter disgrace.
This entire rollout and allocating of funds, has been nothing more than a joke from the start. FTTC is nothing more than a stop gap measure which in 20 years will be the equivalent of fixed rate 2Mb ADSL today.
I suspect most will only realise when its too late and then question why millions of tax payers money was spent on a half baked solution rather than question it and the slow progress are making now..... Oh and it is slow progress before anyone trys to say it is not........ The figures BT give about coverage percent are nothing more than a mask by giving exchange figures to meet their idealistic coverage figures rather than how many people actually have a cabinet to use the service.
Infact mark theres an idea for a survey, ask people to enter there number on the BT infinity checker and ask if they are able to get infinity........... I highly suspect 60% (or whatever BTs latest BS Coverage figure is) will not have the option to take the service.