If you use metropolitan areas then you're just proving the original point. Metro areas in the US are HUGE! For example, the Greater Las Angeles area is ~34k square miles. The entire country of England is only ~50k square miles! Understanding this is key to understanding why the cable and telecom businesses in the US are so difficult to enter.
Per this link [0], there's 10 million homes (out of 90 million with broadband) in the US with fiber to the premise, versus 250k in the UK. The number seems a bit suspect, but I generally trust Ars.
Also, the point I was refuting from the parent post is the claim that Europe is urban where as the US is not. That's simply not factual, as others have also pointed out.
