With film, you have very limited tools to convey subjectivity - voiceover, the camera's point of view, good acting - but even the very best actor in the world is crude by comparison with what you can do in a written paragraph.
I believe, and this is perhaps too nationalistic a view, that the American style of acting puts actors quickly in touch with each other, so that their continuous presence in a company, as in England, is not absolutely necessary.
As for the Canadians - good actors and good directors are sometimes taken by the American market, you know, if they're good enough.
