Yup same here but on a cisco unit. Post here on virgin media forums
https://community.virginmedia.com/t5...026879/page/13
If enough people post they may look at this again. Many won't notice though sadly but a problem more widespread than we realize.
I suspect the perfect test is because virgin haven't updated the settings locally to limit the single thread download.
It even worse for those on heavily congested areas where speeds of 4meg get halved as well.