Well, you can't exactly go by the manual all the time i.e. it's wrong about the oil change procedure.
Seriously, I guarantee you that if you sent your oil off to a lab for sampling they'd say it was super high in wear materials from the break in process. Will it kill your bike to keep it in there for 20hrs, no. Is it much better on your bike to drain out the break in oil and get fresh stuff in there sooner, absolutely. The first few oil change intervals I do are accelerated (change more often) then graduated up incrementally until the normal recommended interval.
This is a big motor with a tiny oil capacity, why skimp, it's only 2 quarts of oil.
My .02