I wouldn't suggest LinkedIn recommendations are all that exclusive today...The way it usually works is that you ask Sue for a recommendation after giving her one (per the way LinkedIn promotes it). It's always tete-a-tete, so in my mind the recommendations are not as valuable as they appear on the surface.
One way recommendations would be more valuable, otherwise it's like saying, "Yep, Sue & I are friends so we gave each other good marks for working together..."
One way recommendations would be more valuable, otherwise it's like saying, "Yep, Sue & I are friends so we gave each other good marks for working together..."