LAX used to have a priority lane go to the far right and you could jump ahead. Usually was pretty quick because you essentially cut in line. I only used this one time and the next time I went I was told it was only for F.

My last flight I was F coming back and got through that line. Its faster, especially if you go to the far far right side IMO. I stay far away from that family line, its a mess. A the tix counter they used to say you can use the elevator to skip ahead if you were F, but seemed to always take longer