My friend and I did this same math after OBAP after talking with the recruiters informally and came up with similar numbers except we banked on 900 for American and US Airways combined. We also counted on no pilots (obviously not the case) leaving a less desirable major or legacy for a more desirable one. Our total was about 2,700 total, which we assumed meant about 4,000 interviews which might seem to drain the pool of 3,000 PIC guys rapidly if all goes as well as we all hope. I'm sure my numbers are probably a tad too optimistic...