This was just posted on another thread:

"Spot on about foreign students. I am working on my cfi at a large school in Florida. Out of 400ish students there was only ONE other person in my Cfi ground school. ONE. Every flight school that I know of down here with the exception of mom and pop places are all 95% foreign (mostly Chinese) students. There are just no domestic people starting training. This shortage is going to quickly get much much worse. I have no idea where all these new pilots are supposed to come from. From my viewpoint they just don't exist."