@mulveling thanks for resurrecting this thread. You make several really good points. My main listening room is in a wood framed house above the garage. Someone using the garage door makes for loud noises, but doesn't induce any skipping. The basement setup is on a concrete slab, but I place the TT atop a 5 shelf Quadrispire stand due to space limitations and concerns about my largish dog's tail. I don't find the non-optimal setup issues to be of much concern.
If your TT skips because of loud music, i can only think it's been placed in bass peak mode area and/or you're playing music really, really loud.