Thats because the points of weighting are the ends of the skateboard when doing any sort of board center grind, when skiing, your feet are in the middle of the ski, so when you are killin the rails at the park, your really just smooooshin the skis, thats why snowboards break in half, and skis usually don't.
The only time you really break cores of skis is when you are doing tons o butter, but since the Afterbangs are horizontal laminate, I think they will prolly hold up better to butters as well. The reason is pretty simple. A traditional vertical lam ski has 1 horizontal layer of wood, and the thicker wood gets, the less bending it takes to break, so with a lot of thin layers, which by themselves are very bendy, but together, are strong, and still very bendy, you get a more poppy, less breakable core.