I voted according to an average of our campaigns. Most of our player character have heard of the Loremaster but wouldn't really believe that they still exist. In all of our campaigns we never met one OR never identified one as a loremaster, which by the way is how I see it, it should be. Loremasters are supposed to work in the shadows, teaching, guiding, supporting but not fighting openly - although I see that the last part might be difficult at times.
We had quite frequent appearances of Navigators which are much easier to play and introduce into a game compared to Loremasters, IMHO.