Clearly, the original poster has had a peculiar problem and the BT staff involved ought to have ben more helpful.
I have to say though that I have had a considerable improvement of late my BT Broadband speeds are over 4meg near 5meg, and no drop outs, no ,downtime, with ntl 4meg service my speeds were 3meg often 2.5meg - with drop outs most of the time. I would suggest people have different experiences, our BT hub seems to work fine over DSL or wireless and frankly I think I'm getting a far superior service with BT for £17 a month than I with ntl's 4meg package at £25 a month.
So BT Broadband is good.