Ha! Quite the opposite.
I've put up with over 12 months of poor Virgin Media performance- I'm in an oversold area, have been given fault codes and am now claiming credits on my bills. I was a Vivid 200 Gamer subscriber in AL5, at peak times I get 12Mbps if I'm lucky- leading to plenty of buffering. And don't even start me on the latency- you can see a typical day below:
My Broadband Ping
I could not have been happier to move to Andrews and Arnold- I get a 50Mbps VDSL2 connection that is infinitely faster and more reliable when I need it than my old Vivid 200 connection.
Ignore Virginmedia's headline figure marketing- you may get lucky, or, like me you'll find yourself in an oversubscribed area with no fix for months/years.