It seemed to take forever, but it was actually 45 minutes AFTER we scanned our FP.
The backup came after we merged; those lines were backed all the way up so we stood for a good while. Then, the two pre-shows take a lot of time. We have only ridden it once but the first room seemed to be “stuck” – we were in there awhile and it kept repeating itself. The kids in the room ended up sitting down (and I was tempted to, too, if I thought I could have gotten back up gracefully!).
I wish there was a fast track through the pre-shows