I am 180lbsand have ridden off many 6" curbs with 25c tires on 20/24 wheels and I have never broken a spoke. and I bunny hop speed bumps all day long. again never broken a spoke.
Just saying I am more brutal on wheels in town than I ever am on gravel.
Makes me wonder though what happens to a wheels and spokes when speed is factored in. Big difference between riding off a 6" drop at 20 mph vs 10 mph?