Despite the moaning I don't think the Yanks will go home. The reason being is that aviation in the US is so unstable, why leave a ME carrier where you would be assured of a job or go back home to be retrenched in 5 years time and earn a real crap salary.
Many of the RJ boys will stick around to try and get their command on some "heavy metal" and once they have over a 1000 hrs PIC they'll go and work for an airline that will allow them to commute, i.e. Korean, and live in the US