I was last teaching at a big school in San Antonio in 2008-2009. The ratio was at least 10 to 1 not in favor of domestic students. That school has since gone under due to foreign airlines not paying their bill on time.
My take is the puppy mill schools, especially the ones that do not accept foreign students are fixing to get a really rude awakeing. Few people can fork over 60K - 80K for a three to six month school and no one is lending that kind of green for it either.
In the long run, airlines with do one of two things, start their own training school for the zero to hero guy,,,,or hire boatloads of non-domestic first officers.....riiiiiight......
also....if oil prices dont get too out of hand,,,,we might actually have a miniature pilot shortage in this country....again...considering crude and mid east ....