I was very struck by this also. We kept trying to figure out if it was because the fp lines are empty, there is nothing else to do but rides so more people are in lines, or what. The physical lines are way outside of many show buildings and clogging walkways but the wait times are reasonable. Can anyone explain this?
Let’s say a ride has a capacity of 2000 people per hour, and the wait is 1 hr. You enter the queue. That means at that moment, there are 2000 people physically in line, in front of you. And that takes a certain amount of space.
With Fastpass, there are now two lines. The old standby line, for every 1 person that comes from the standby line, there are 1-4 people coming from Fastpass. So instead of 2000 people in front of you, for standby to have a 1 hr wait there only needs to be 1000 people (in the case of a ride that loads 50-50), 666 people (in the case of a ride that is 2:1), 500 people (in the case of a 3:1) and only 400 people, in the case of a ride that loads 4 Fastpass people for every 1 standby. 400 people take up significantly less space than 2000.
The other 1600 people the ride needs to fill its seats, are casually filtering in the other line over the course of their hour window. They won’t all arrive at the same time. If the wait in Fastpass is ~15 minutes, that is also 400 people.
So at any given moment, for a ride that is 2000 people per hour, and 20% come from standby and 80% come from Fastpass, 400 people are in standby, 400 people are in Fastpass, and 1200 people are elsewhere (clogging up walkways, in other lines, eating, shopping, etc). Right now, they are all in the very long standby. And people aren’t used to what that looks and feels like.
And it looks like I took too long to respond, but maybe it’s still useful.