There used to be a 1/8 of a mile queue of cars at the then-new Serramonte Shopping Center Chic-fil A. There's also a large food truck court right in the parking lot but you have to get out of the car which is apparently an inconvenience for many people. I tried Chic-fil A in Tracy once a few years ago. Never again.
Nothing compared to In-N-Out. Even with a short line inside and plenty of available parking, most of their customers are willing to go 30-40 cars deep in the drive-thru.