I have the Birnhaum's guide and I read that you can do ride swap. I think that is the name. One adult/child can go on and then the next adult in that party can go on with little to no wait. Hope that helps.
I think single riders have to wait in the same "line", but once inside at the gates to the ride, there is usually a specific lane for single riders. I think the wait is the wait period...although asking couldn't hurt.