They also thought a 7% take-up in Whitchurch was good????!!!! Well the latter town is based on the Welsh border, which is not exactly spreading their net (no pun intended) that wide, is it?
I believe the confused and contradictory article quoted has led you to a misunderstanding; The Whitchurch referred to is not the town in the North West of England, but an area of Cardiff and the name of the exchange which serves much of North Cardiff. Cardiff is not so small that it is only served by one exchange! There are two other enabled exchanges with another planned for the end of this month which still leaves 7 exchanges to completely cover Cardiff. Even then, that doesn't mean that all the cabinets for each enabled exchange are themselves enabled! According to Stuart Watson of Zen Internet, as many as 60% of cabinets for an enabled exchange are not cabled up.
Having had a quick look, one of the three enabled exchanges (Llanishen) has 22 cabinets enabled and the upcoming one has 15. The remaining two have 60 and 66 cabinets enabled.
I live in North Cardiff and I was on the initial FTTC trial (in fact, I was, at that point, the only non BT customer to take part in the trial).
I would say that aside from possibly targetting their own customers (I'm not one, so I don't know), there has been very little publicity from BT about FTTC in Cardiff and only very recently have I seen public advertising in the form of billboards / bus stops, etc about BT Inifnity. If the wider population doesn't know what it is or the fact that it exists, how can they be expected to opt for it? I know of at least 5 people I work with who are now on FTTC now after I told them about it (they didn't know that this 'super fast' broadband was even available here until I pointed it out to them).
It probably doesn't help that it's not widely available from every broadband provider, so surely the takeup shouldn't be blamed on "everything dies in Wales". More likely the fact that still relatively few people are able to take advantage of it.
One last note; the 7% takeup doesn't make clear whether it refers to all premises or just the ones which can actually get FTTC.