Just wanted to post a quick note getting this back on the speed rather than cap topic somewhat.
I have the 750K package through a Pace STB and realising I would not be upgraded to 2Mb without an upgrade to the STB I rang CS yesterday. The happily booked me in for a STB swap for the 10th March which was the earliest slot they had. I am in the Leeds area but would suspect these lead times are mirrored throught the country.
So the suggestion is to ring up CS now and book that PACE-> Samsung upgrade if you want 2Mb as soon as it is available.