Don't believe a word they say. They are desperate to fill the right seat behind all the other pilots waiting to upgrade. Assume all of the 50 seat aircraft will be parked and go from there. There are only a few pure 76 seat aircraft regionals out there that don't have to park any 50 seat aircraft and even at those, most have missed the boat. PSA just has 50 seat aircraft that will be parked, making their seniority gain slower.