I have to admit I've never watched much Downton Abbey: what I have seen makes it look like it's just a period ITV soap opera in which posh people are the saviours of the poor working class people who toil for them.
But it's very big right, particularly in the US. Part of the charm is that the English accents make it seem like a very 'classy'* show. Now Steven Colbert's got Michelle Dockery, Hugh Bonneville and Allen Leech to try to do a scene of the show with American accents, to see if losing the accents affects the US viewer's perception.
It basically all sounds as badly written as I suspected, but how about you, American readers? Does it reduce Downton's classiness to hear it in a variety of US accents?
* Different sense of classy there, but how ironic