After taking a couple of trips it seems that different airports are, well, different. At SAN the lines were long, crossed over each other and some of the security folks were on the confused/confusing side. (Telling people to go into certain lines, then closing that line comes to mind....) At SMF things went smoothly and quickly. Much of your timing will depend on how busy the airport is overall and at the time of your flight. Peak times at SAN are on the ugly side, mainly becasue the terminal is too small for the number of people waiting in line. But off peak hours it is almost business as usual. Be careful what you pack, be patient and have your ID and other documents in order and you will have no problems. Be like a woman who was checking in near me who "forgot" her ID, was trying to get on a different flight for which she was booked and had her entire house packed into what she wanted to carry on...well....Some people are just stupid.