10 minutes turn around sounds unbelievable. I fly Southwest all the time and just disembarking takes 10 minutes. Were these small planes with no carry-ons allowed?
Agreed, I think this is corporate lore and mostly bullshit. I've flown Southwest many times and they're not turning those planes around in anything approaching 10 minutes, it's more like 30-45 mins. I don't doubt that they aimed for that and maybe even hit it here or there, but I'm highly skeptical that it was the norm.
Southwest has a 737-only fleet. They allow carry-ons.