By comparing the seniority lists from the August and September bid periods, we had a net gain of only 10 pilots.

So I conclude that either:
a) new hire classes are drying up, (because word is out that there are much better places for new hires to go), or
b) new hires are failing training at a significantly increased rate, or
c) guys are moving on at an increased rate, (which I haven't noticed).