That's not strictly true about everyone waiting the same length of time for rides. Eg:- family one (no RAP) enter the park and immediately get in the queue for Nemesis. They queue in the line for an hour, go on the ride then go to queue for Galactica, queue there for an hour, then ride then get lunch. Then queue for 90 minutes for the Smiler.
Family two (one RAP) enter the park and ride Nemesis with RAP, they then decide they want to go on Galactica and while hour wait is counting down for RAP they ride curse of Alton Manor and maurderers mayhem. They then go on Galactica and get some lunch while their counter is going down, walk over to the Smiler and ride that.
Family three (two RAP's) enter the park and ride Nemesis with RAP1, they then walk over to Galactica and ride that with RAP2. While waiting for RAP1 to count down they do a couple of rides in mutiny bay, they then walk over to the Smiler and ride that with RAP1. They get off the Smiler and ride Oblivion with RAP2. They then get lunch.