I have a Turbo on one of my bikes and a concor on the other, both suede. After a while they'll smooth out and the texture will eventually become like smooth leather. I rode an alleycat with my Turbo, and the rain softened the leather too much and now there are clear areas of wear. I personally think the wear looks cool, but you will shorten the life of the saddle if you're always running it in the rain.

I've since learned to swap my Selle Italia Flite in for the wet weather days.