I've been suffering in Area 20 for over 12 months. When Virgin started quoting how much data I'd used when I complained about the speeds, that was the final straw. My 50mb broadband frequently dropped below 2mbps at peak times. Yes I had 30mbps at 4am and 2pm, but that isn't when I needed it.
Finally switched the BT, so far, so good. Download speed has been consistently 50mbps everyday, regardless of time. Even with copper connections, BT are still out shining Virgin massively in Area 20.
I think you've given them enough of a chance, I know I did. Just wait for the bad attitude when their last ditch team try to tempt you with double speeds for half the price. At the moment I wouldnt pay £5 for their 300mb broadband. Until they invest massively in their infrastructure, i recommended running away as fast as you can. You won't regret it, I certainly haven't.