I would like to know what species of wood that table was made from and whether those wide boards were plain sawed or quarter sawed. All these things do matter. We are trying to solve a warping (cupping) problem here, not brag about how our projects haven't warped. I agree that warping doesn't happen often and that it can happen on a flip-flopped grained panel if not treated and handled properly, and many factors go into why a panel warps. I also agree that appearance takes priority over grain pattern. Here, we are trying to investigate which factors caused the warping problem so we need to go into the physics of water absorbtion in the wood. Most likely, not as many coats of finish were put on the back side which allows more moisture to be absorbed on that side, which swelled the cells and expanded that side or the opposite; the top side lost moisture and shrank, and it had nothing to do with grain orientation. That being said, if the panel has several boards which were plain sawed, and the bows of the end grain are going the same way, the chance of cupping increases considerably. You can't deny that boards cup and wider boards cup more. Plain sawed boards cup more than quarter sawed boards. Every species of wood differs in the tendancy to cup. Saying you were "lucky" was a loose phrase. When we are staring at a panel that has cupped and we are cussing because all our work has been wrecked I won't say we are unlucky, either. I just don't like to see anybody in that position. I've been there.