Probably so Onager but I understand there are atheist groups in USA but no such communities in Britain. None on the internet that I have found so far.
How about a news headline: Russell's orbiting tea-pot dicovered!
"Russell's teapot found! - Tastes delicious says Buzz Aldrin."
Um, Richard Dawkins is English isn't he? I don't think he just sits in his bedroom, arguing with his pot plants. Mind you, when I looked up the "Brights" organisation, which is linked to Dawkins in my mind, it's American based.
I guess I don't have any evidence to refute your argument, it just feels to me like everything American is writ large. The UK could have 5 atheist organisations, but America will have 500. Plus the organisations in the UK will be distributing a monthly newletter by posting photocopied sheets to their members (hand delivered by Doris on her trusty bicycle), while the American organisations will have their own TV channel! :)
"In other news, the missing link between humans and monkeys has been discovered! Asked for a comment, the Archbishop of Canterbury said: This proves nothing, where is the missing link between the missing link and the monkeys and, also of course, the missing link between that missing link and the original missing link? Eh??"