I disagree, I think you would be hard pushed to find a little girl that like to ride stacked up on her board. Most kids, especially girls, like to ride a little open, having less of an angle on the back binding helps them out. They don't have the strength to twist the board, and mostly rely on rotational movements of the body to turn. Most kids will ride with a good deal of separation, and not in the right way, but it is what it is.
What does "ride stacked up" mean? Straight and tall?