The Evoke is not a "stock" saddle. It is the Bontrager saddle designed for more upright (mountain bike) riding that comes in three different widths and 3 different amounts of padding. There are men's and women's versions of each.

http://www.bontrager.com/products/components/saddles

Trek ships many new bikes with Evoke and Affinity saddles now. They are nothing like the old stock saddles they used to use. They might not be right for a specific buyer, but they are based on Bontrager's Inform research and design.