Something isn't jibing here. Do you mean to tell me that Gwynnie could be wrong and that maybe the U.S. isn't actually the crappiest country in the world? Huh.
The poor ignorant dear doesn't know what selection bias is.
If you are an average American who has lived your whole life in America, you have been exposed to the vast diversity of all Americans, from the most educated and sophisticated right down to the rap singers and Jerry Springer Show guests.
On the other hand, if you perchance should meet an Englishman with the means and motive and opportunity to travel to America, you are not very likely to be meeting an average member of British society. Slack jawed school leavers and multi-generational dole-dependent layabouts on sink estates do not jet off to Hollywood to meet up-and-coming young film stars.
And when the up-and-coming film star becomes the world famous and wealthy film star, and visits or moves house over to England, once again she will not be meeting anything like a representative cross-section of the English people. I could show her round a few council estates in the dodgier parts of greater London that would cure her of her ignorant, snobbish Anglophilia in one afternoon.