Sorry to revive this but i noticed somthing
http://www.thinkbroadband.com/download/
downloading the 1 GB file; the only way to possibly achieve even near to what ic an normally download from websites is using 'download them all' plugin on firefox which is set to download from 16 concurrent connections
If i try to download from thinkbroadband normally
Yet other downloads can get past 2 mb/s fine.

It almost seems like TBB are limiting the speed per connection to virgin media?

---------- Post added at 12:20 ---------- Previous post was at 12:12 ----------
Also downloading a single file 1.5 mb/s
yet if I download 6 concurrent files they still all go arround 1 mb/s (all download speeds combined = 6100 kb/s)