VM do throttle newsgroups and peer to peer on all packages between 5pm-midnight Monday to friday and 12midday to 12midnight on weekend.
also there is a traffic policy for those on some packages that can be seen here...
Slow speeds can be down to a lot of things such as power levels on ur connection, problems that are known with the superhub. My advice would be to try every avenue such as getting ur power levels and so on checked first because if it does turn out not to be a throttling case and just something simple its gonna make u look foolish.
Athlon 64 6000+ AM2 X2, ASUS M2N-SLI Deluxe 570 NForce Mainboard, 4GB DDR 2 XMS2 800Mhz Cosair Ram, 5589.05GB Hard Disk Space, 1GB ATI 4670 HD PCI-E 16x Graphics, 700watt PSU.
Ex AOL Dialup 56k Customer....
Ex Freedom2Surf 512k and Ex Eclipse Internet 2mb Customer.
Virgin Media 50mb Cable
Virgin Media R EVIL!!!