No, I don't think your assumptions are wrong, but there are obviously a few other things up the sleeves of BT.
Plusnet have been trying to get my profile altered by BT for the past few days. What can be taking so long ?
Do I understand that you don't get all this messing about with a LLU provider. I took a quick look at Be the other day, and they say that yes, they can provide me with a service, but it will be at 6Mbps. I assume that must be based on some stats that BT provide to them, and obviously doesn't take into account the fact that I've been connecting on Plusnet at a solid 8128/448 from July 2007, and more recently since going on the trial seen speeds of in excess of 12000.
I just do not know what the answer is to this situation, but something just ain't right about it.
TTFN
toulouse