Length of service. Guys who accepted recall this Feb, and returned by July, got a two year bump to their LOS.

That generated a recall bump of about 145 guys.

The next group of recallees don't get that two year increase to their longevity pay. That's why people think the number/percentage will be less. But done guys with good current gigs, but realize AA is better in the long term, are delaying their recall until May 2016. How many is anyone's guess. And it goes in reverse seniority order so a senior guy might not get called for several months.