Mine started playing up in October last year. Even though I've gone with BT, my Virgin connection is still live till the end of the month and I still monitor it but don't use ut, and it's still not fixed. They are a company of false promises in regards to fix dates from my experience.
Based on the info there, I would ask some people in the area who are with Virgin and see what they feel. Remember, if they just use the net to get emails and looks at BBC news, they probably are none the wiser. You need people who are gamers and watch on demand video etc.
Based on those forum results though, I would personally avoid Virgin Media.