Hi
Problem could be the Torrent site. A lot of them nowadays are requesting that you use a particular port range for downloads. So if 50% of the users seeding are using, for example a port range of 5550:5900 and you only have ports
5500:5600 open in your firewall then all the seeders using ports from 5600 upwards cannot connect to you.
Look at the torrent site and see what port range is recomended.
I have a similar problem with a partcular torrent site which was fine until about 3-4 weeks ago and now I can only get similar download speeds to you.
So dont worry, I really dont think it's your ISP
use this link to test your speed
http://homepage.ntlworld.com/robin.d.h.walker/speedtest.html?1087388541322
to repeat the test click on the here on line
To repeat this test from the source server click
here.