However I have sat in on numerous FT's from American, Australia, Scotland ,Canada, and so on, and they all tend to teach good standard English, and the same English. They also know all the different ways of saying

I'm not seeking to American bash but it's my observation that they often don't have such a good knowledge of the idiosyncrasies within the language of other English speaking countries compared to how much say we british are aware of the various everyday idiomatic phrases that are unique to the americans. I think this can probably be put down to the large amount of tv and movies that are produced in the US and then get shipped across the pond.