The thing is, VM are playing it up, seeing it as a big thing, the fastest speeds in the UK etc, it's great while they're blowing the trumpets for PR, but they don't really care how the customer side of things go.
The reason they were publishing a list of the modems that need upgrading and rollout timetables is surely so customers won't spend all day phoning CS to ask the same questions over and over again, now it looks like the lists won't be done in time and they'll still get the phone calls, making it a nightmare for their own staff and wait times on CS.
Alex Brown himself seemed pretty embarassed making the announcement on newsgroups, it was clearly a bit of a cock-up.