Could be neither, but the lack of availability at the present time
, so debating whether to wait for fibre or take basic ADSL and find fibre enabled for their area a day / week / month later.
I had been checking my local exchange on superfast-openreach 'where and when' checker, and it was saying Sept 2012 for a while, then Dec 2012 and then March 2012. Early in January I queried this with Openreach and was told the date just rolls on 3 months if exchange not enabled.
Was further told it'd be May 2013. Now see that the exchange is enabled but only area that is currently able to place order is some distance away (where Virgin is present and active). It's something of a lottery as to how long one may need to wait to see if fibre available from nearest set of cabinets.
If you run a business, have a second ISP and backup web hosting...