UK porn use: Milestone study

It's Britain's "first major study of online pornography" use, The Independent reports. One in four UK adults – 9 million men, 1.4 million women - downloaded pornographic images last year, "making Britain the fastest-growing market in the world for the booming £20 billion [about $37 billion] adult Web site industry." The Independent says the 9 million figure – up from 2 million in 2000 - is about 40% of the UK's male population. Some questions come to mind…. Would the numbers look much different in a similar study in the US? Is there something to be learned, here, about the impact of convenience and accessibility?