Good news for anyone who has a Star Alliance Gold (or higher) status with their frequent flyer program. You can check in at the Star Alliance Gold counter (rows B10-14) for the past few years, and then go around to the back of Row A, and use the VIP security and immigration counters. This is a great way to avoid the long line ups at the regular counters. I only discovered this on my latest trip to LOS.
Unfortunately I don't think this applies to entry yet, but they have gotten quite efficient at processing the big line-ups on entry.