Man that broom handle trick bugs me too and you did the right thing keeping your mouth shut in the store because that kid would not have listened anyway. I have seen the same thing around here and every head I pull that got the poke test is packed with dust or paint overspray. Spend the 12 bucks and sleep at night, it is cheap insurance.

Sounds like the kind of number that gets thrown around after a sales guy buys lunch for the whole office. Cutting dusting by 60% on paper is easy when the test slab is brand new and nobody's dragged a forklift across it for three years. Real warehouses beat the heck out of a floor, and a lot of that dust comes from the mix itself, not just the surface. Your mileage may vary, but I'd want to see it hold up on an actual pour before dropping an extra 3 grand. Take those data sheets with a grain of salt, they're written by the folks selling the stuff.