[keevie]

I'd say a much more important purpose of a cutting board is to protect the edge of your knife. If you hit the edge of your knife on something really hard, it'll chip, or fold--basically just ruin it. This might not be such a big deal for home cooks with super dull knives (after all, glass cutting boards still exist for some reason!) but for a professional I'd think a cutting board that destroys your knives would be worse than useless.