I recently returned to Virgin Media after 7 years with sky (they wanted to increase my price to £111 a month just for T.V. which seems steep) because it is cheaper to have a full suite of services with Virgin Vs Sky on its own.
I have the oomph package.
So far, wireless or using a cat 7 ethernet cable, I haven't seen close to the 530mb average I was told I would receive, I'm lucky if I see above 450mb with an average closer to 300mb. That's not too bad compared to my B.T. connection but it's a long way away from what I was promised.
The live T.V. seems to be better than it was earlier, though not perfect (the picture skips every now and again) but streaming is still bad. I get frequent buffering while watching 720p videos on YouTube, you can imagine that this only gets worse when I increase picture definition to 1080p and above.
The cable comes out of the wall socket, runs around the wall for a total of roughly 8 metres and then goes directly into the little box that splits the cable for T.V. and broadband, there aren't any other splitters on the cable.