that's an excellent point jabberwocky and fits with what had been mentioned about an East/West divide, which is VERY real. That's not even diving into the North/South divide, the ante-bellum South, and the pockets around Seattle, Portland, San Francisco, and Austin
I qualified my statements by saying that I had grown up in mormon communities, and the mormon church subscribes to a variation of the 'quiverfull' ideology. (ok, pedantic; they believe humans must 'multiply and replenish the earth' and are therefore not opposed to birth control but do believe that it is desirable to have as many kids as humanly possible - different scripture, same result)
Cultures are VERY different around the different regions of the US.
That said, I think what Americans are generally up against overseas is the 'image' of the US that is exported in media. Here in the UK 'Friends' and 'Sex & The City' are played on the same station and classed as sitcoms where in the US, Friends was on one of the big three network stations, equivalent of freeview, as well as licensed on other smaller stations, but SATC was on HBO which is only available as an extra, subscription service to cable subscribers (it is now available on network television but has been HEAVILY edited). The difference reflects what the US population feels about the content of those shows, but that difference is lost when the show is exported and someone could easily get a distorted impression.
It goes the other way too. The British shows I saw in the US were Mr Bean, Monty Python, Red Dwarf, Are You Being Served, etc - basically nothing from the last 20 years (maybe too sexual for export? ). This gives a distorted view of British people to the American public. You have to go out of your way to add BBC America to your cable subscription.
LOL, Stewie Griffith's actual mom also beats her husband and steals for fun - hardly representative