I have to admit, I am confused by the possibility of standby queue times being the same before and after the 1999 introduction of FP (adjusting for attendance, etc).
Here is what confuses me:
Say I visited The Magic Kingdom in the summer of 1999, before Fastpass. I rode Splash Mountain, Space Mountain, Big Thunder Mountain Railroad, Pirates of the Caribbean, The Haunted Mansion, Peter Pan's Flight, and It's A Small World.
Then let's say I visited again TWICE in the summer of 2000, when Fastpass existed, and I went on days that had similar crowd-levels and demographics as my visit the previous summer.
On the first of those days, I went on all of the same rides as 1999, and I did not use Fastpass. If Fastpass does not affect queue times, I should have spent the exact same amount of time in line.
On the second of those days, I went on all of the same rides again, but I used Fastpass for the three mountains. If Fastpass does not affect queue times, I should now be spending less time in line than on either of the prior two visits.
Now, multiply this by every visitor. It would mean that with Fastpass, everyone waits less on average, even though the ride capacities are exactly the same as before.
Now that I think of it, this could make sense. It just means that part of the "wait" has been converted to "virtual," and thus everyone really can spend less time in queues and more time in the park with the existence Fastpass. Is that correct?
And if that's true, the other consideration would be that Fastpass makes the parks' walkways more crowded, which is obviously a particular problem for Disneyland.
I wish there were "No Fastpass Days", just for the experience.