Probably definitely internet waffle...There's a bit of that going around when it comes to tyres I think ;)
I think there were different ply thicknesses depending on load ratings or something, and people reported the sidewalls weren't as tough as some competitors but maybe they were putting jack hammers through the sidewalls who knows with some of these internet reports..."I put a jack hammer through the sidewall and the damn thing couldn't take it, they just don't make them like they used to these days"

