Right, I understand that. BUT, if the people getting Fastpass would have gone in the standby line anyways if Fastpass was not available, then that means there are more people in the line, and anyone behind them waits that much longer. In fact, what it really does is allow some more people to get through the standby line faster because the people who got the Fastpass stay out of the line a bit longer since the Fastpass is (usually) for a time later than how long it would take to get through the standby line. No one should truely be _delayed_ due to Fastpass, but there is always the _perception_ of being delayed. If you understand that the Fastpass people would have been in the line in front of you anyways if they didn't get a Fastpass, then you'd realize that you are not really waiting longer because of it
It's not just a perception of delay - the standby actually must move slower than it would without FastPass. How many people are in the standby line has nothing to do with it; FastPass slows standby loading down whether there are 50 or 5,000 people waiting standby. Consider an example (fictitious) attraction with a capacity of 2,000 guests per hour, with 500 FastPasses distributed per hour (easy numbers just to keep the math simple!). Assume there are 3,000 people in the standby line at, for instance, 2:00. With only a standby line, the 3,000th person in line at 2:00 should board in about 90 minutes. However, with FastPass you have another 500 people returning in that first hour for priority boarding. So, while 2,000 persons in the standby line should have boarded in those 60 minutes (leaving another 30 minutes to reach our example '3,000th' guest), now only 1,500 standby riders will get through the line
in the same amount of time, and our example rider will spend a full two hours in the standby line with FastPass (90 minutes without FastPass); The same total of 4,000 riders will still have boarded in those two hours - 3,000 standby and 1,000 FastPass.
If you hold a FastPass, and know how to use it effectively, this is a tremendous benefit, but it comes at a cost of longer waits for those who have to wait standby. Which will ultimately be all or most of us at some point, unless you manage to obtain a FastPass for every attraction you ride. You also cannot assume that the standby line will be
any shorter because of the existence of FastPass - these guests
may not have been in front of you anyway. As YoHo said:
The thing is though that many people judge whether they'll get in a line based on current wait, so you can't say that the line would be the same length, because it may not have been.
If FastPass otherwise makes the standby line shorter, this provides an incentive for more people to enter the standby line for that attraction - it doesn't stay that short. Actual wait times aside, if you see a half-empty attraction queue (half full because the Fastpass people aren't in it) you are more likely to line up yourself. But those 'missing' FP'ers are still going to come back, and since they are 'virtually' in front of you, you are going to wait longer in that standby line. But if there really were fewer people in the standby line, because the remainder are elsewhere holding FastPasses, the smaller number of people who are in that line still move slower than they would without FastPass. In the example above with 2,000 people per hour, instead of having all 2,000 in the standby line you have 1,500 there and 500 returning with FastPass. Without FP rider #1,500 should get on in 45 minutes; With FP it will be about an hour or close, because those FP holders will show up before the end of that hour specified on the FastPass - our example rider 1500 will have to wait for all of them.