Skipping the comments about poaching, I am guessing that the poster who wrote this has never tried smooth ivory grips. In my experience, smooth ivory provides a good amount of traction, even with sweaty hands. Smooth ivory grips, in my experience, provide a more positive grip than smooth or lightly checkered wood grips. The only material that I have encountered that provides more traction while being smooth is FR-4 (the flame retardant version of G10).
In addition, most of my grip traction comes from the front strap and mainspring housing, both of which are serrrated on my pistols wearing ivory. I want smooth grips on a carry gun to eliminate snagging and wear on cover garments. Repeated practice from the holster under the hot Alabama and Georgia sun has proven to me that smooth ivory is a very good choice for the 1911.