Having already had Torchy's for breakfast but still wanting to try something at Austin's airport, I settled on coffee from Ruta Maya.
I ordered a double espresso, which was served to me in a 12 oz cup. There was a bit too much water, it was burnt, it was way bitter, and it was too oily. It was actually worse than Starbucks espresso.
Their website makes them seem committed to great coffee (plus values 'n' shit), so maybe it's just that the people who work at the airport couldn't give less of a crap about good coffee.
Espresso Rating: 2/10