It depends on how many at LAX are going to your destination. The Super Shuttle vans hold a MAXIMUM of 9 people. I used them several times to and from LAX on my June trip and there was never 9 people on each journey, one journey had me and 4 others.
Dont stress out about how many people or how long it will take, its not worth it, just go with the flow.
@Lebestiole when you and your mom land at LAX just head out to the Super shuttle pick up point, and check in with the Super Shuttle Rep. You give them your confirmation number and they find your booking on their hand held device and they will give you an approx wait time. I know what its like arriving in LAX and just wanting to get to your hotel, my flight to LA is approx 10 hours, but honestly, just chill. Dont expect to have a Super Shuttle waiting to take you to your hotel as soon as you go to the pick up area.
@LadyBJ the same advice to you. Just chill, and dont make problems where there are none. So what if you have to wait 20 minutes for your van, so what if you have to pick up and drop off other passengers. Yes I know travelling is long and tiring and stressful, I fly from Europe to LA every year, thats approx 24 hours from the time I leave my house to the time I arrive at my hotel, but having been travelling to America for nearly 10 years as well as all over Europe, I have found its just not worth getting stressed out about delays and traffic and tranpfort issues