No, your probably one of those people that jumps up and wants to get past everyone, me thinks. I think that the plane should deplane from the front forward, if someone needs extra time they should hang out for a bit, but if I am in row 10 and you are in row 14 and hoped up to rush to get past a few rows, then I think you can wait for me and everyone in my row to get up and go before you.
And to your question, letting the line of jumpers go just means they get off the plane faster, not that the plane deplanes any faster.
-Patrick