I haven't been to that site, and don't intend to visit it. But if it is about "mature" women in their 40s or so, I have to agree: that is the age that you want your woman to be for maximum sexuality. Before the age of forty, women just don't know how to enjoy sex. Between 40 and 50, they are awesome! After 50, well, I suppose it depends on the woman.
I remember when a 40-something woman was an "older" woman. Now she's several years behind me! But I still likes 'em.