Well that's kind of a funny question. I strop all my new factory edges when I get them. And I strop them periodically as they see some use. I think that most factory edges are approximately 40 degrees inclusive. Stropping them without reprofiling them still benefits the edge in my opinion. I think most of the time one reads about stropping one reads about it after someone has reprofiled or simply resharped a knife. Stropping is key there to remove the wire edge. Factory edges are not as prone to wire edges (that's a very general and probably over broad statement but I'll go with it) simply because of the grinding technology available to the cutlers. Never the less, stropping any edge, if that edge is sharp, will improve it if you have good technique IMHO.
I am a big advocate of the strop.