I know we've danced before but I guess I'm bored, so I'll try again.

To the bold:
1. The way I read your scenario, 100 people have FPs within the window, so "only" 50 are late. Your portion in bold assumes 100 are.
2. Will that extra 50 slow down the FP queue at that moment in time--yeah. But, did not those same 50 people not going through earlier over the course of the day speed it up by the same amount? Isn't it a net wash? Especially if the FP queue is never empty? Is this last assumption the flaw you see in my position? Why does a
re-ordering of faceless people through a queue before you change your wait? Isn't a re-ordering all we're talking about?
Your move.
And before anyone does, don't read this as frustration or anger or bitterness about the new system. I've adjusted--really I have. I've been twice now since March 7 and got along fine, with no real perceptible difference in wait times to me. I am simply intrigued by the mathematics of the problem.