I've rented 15 times from LAX this year. My Blue Chip rez has always been ready, and I've never taken more than 10 minutes to get out the door on pickup or 5 to return. Economy car or Wild car has gotten me SUV's, convertibles, PTs, and a loaded 300.

Their shuttles are less frequent then the other majors. The trick is if you see a FOX shuttle first, hop on that. They're right next door. Works the other way too, though don't use Fox unless you have time to waste.