I think we've covered all the bases at this point and I don't have the time or energy to do the research. I'm confident that there is melodramatic, unbelievable storytelling rampant in both American and British writing these days. There are American fic writers who write strong prose and beautiful stories and plenty who don't. Same goes for Brits.

Going back to the beginning, it's my opinion that whenever a person lists negative generalisations about a culture to which they don't belong they are bound to insult and/or irritate members of the maligned culture.