UK members.

Americans love an English accent, but most don't realize there are so many. They just think of the stereotypical (or the most heard) ones they hear in the movies, TV shows, chat shows and news channels. And because they don't hear much at all of the others, they often mistake those people as being from somewhere else (other than England) when they do hear it. People who are from the Northern areas of England may get asked if they're Scottish or Irish, and Scottish people may get asked if they're from Australia. There are some people who will be able to tell where they're from, but a lot won't.

I wonder if there's a correlation between English accents and intelligence. Every time I hear a person with an English accent, they immediately seem more intelligent. Like they know what they are talking about. 

The Glasgow accent is particularly difficult for we Sassenachs to understand. I once met the parents of a Scots friend the day they stepped off the plane to visit their son. I saw on the edge of the seat and kept my eyes glued to their lips in an attempt to understand them. And even that didn't help with those words which are unique to Scotland.

i used to see people from there at the resort i used to work at, they would hire people from all over the world there

I don't think US accents are hard to understand, but perhaps I just haven't heard the ones that would be. Some US figures of speech are just not widely known here, though.