Delta doesn't need to #1 in AUS. They just need to be competitive in AUS. Look at BOS and SEA. They are not #1 in market share but they are competitive. If you look at both SEA and BOS gate wise, they have more gates in BOS and SEA than what is proposed in AUS. Since Delta operates a hub and spoke, the real estate required to make a true dent would be quite substantial. As we know, hub and spoke is a great way to connect passengers but a inefficient use of gate utilization. On the other hand, SWA is a p2p, so doubling the gates, just by that definition will create bigger footprint. I don't have any data to back this up but I suspect yields are better in AUS than DAL or HOU. If Delta can get a slice of it, to them its worth it. Plus it dilutes the yields that SWA enjoys at the moment.