It often surprises people just how far away their planes are while flying. I have seen people crash out in the woody part of our flying field and when they couldn't locate the wreckage, I would go out there and sometimes find it way farther away than the pilot thought it was. Also, people often underestimate how long a second really is. You may be hearing a quarter or half second delay but imagine it as 3/4 of a second.

I have seen an Evolution flywheel and I don't think it is large enough to create a significant delay in spoolup time. There is way more inertia in the tips of even a wood prop.