About 2 years back we signed up to BT Broadband. At first we got 2Mb download speeds but this has dropped to a pretty terrible 600-800Kb. Rang up BT today because I'm kinda fed up with it. They ran some tests on the line and said there was noise on the line (other than me shouting down it to be faster ). They're going to fix it in a couple of days but I'm just wondering if noise is really responsible for such a drop in download speeds and overall quality, sometimes the internet will be fast but cut off every few seconds for a second?