I just went live yesterday and the speeds were matching what I was getting at BT but as soon as peak time hit the speeds went to as low as 5meg when I am sync'd at 63meg.. whilst I understand to expect speed drops during peak hours this is shocking for what I pay for..
I have tried turning the router off to no avail and tried all the other troubleshooting guides but I know its congestion!!
I am on the Drumchapel (WSDRU) Exchange
Speedtests - http://www.speedtest.net/result/4574960049.png