Oh man if that's true I hope it replaces dimensional lumber for floor joists. I'm not sure which psychopath invented span charts for home building, but it's extremely rare I'm in a non-slab house where the cabinets and such don't rattle from just a normal person walking across the floor!

I ended up putting beams in to half the span across my own house because it got so annoying(I want to say they are high grade SYP 2x10s @ 13 or 14')