I've only been to CFA a few times, but even with lines wrapped around the building I don't think I've ever waited longer than 10 minutes. Burger King is regularly that long of a wait and I was actually stuck waiting 20 minutes at McDonald's last week (they asked me to pull up and pretty sure they forgot about me.) I try to plan ahead and not rely so much on fast food, but as much time as I spend in my car driving for work, I'm usually stopping somewhere 1-2x a week.