Yup, there's a bunch of washboard roads around here. Problem here is.........if you drive 'em at a high rate of speed, you'll slide off a cliff or into a wall of rock & dirt because they're really bad on tight turns. I usually encounter them on my way to run a trail so I air down once I hit the dirt road since I'd I'd do it at the trailhead anyway. After airing down to 10-12 psi, I can barely feel the washboards & the tires stay on the road surface.
About the video, I didn't post it as a bash on the Tundra, I posted it as an example of "There is no perfect truck". Where the F150 excells in the frame department over the Toyota, I'm pretty sure that there would be something else sub-par to the Toyota on a different part of the F150. It just struck me as very funny when I saw that video since the new Tundra is marketed as the best light duty truck...............EVER.
The "C" Channel frames on Rangers & previous F150's sure have a lot of bend to 'em kinda like the Tundra does. They may not wobble the hell out of the bed like the Tundra but they're not real strong either.