I tried it out and some of the connections are dubious to say the least, for example for the photographer Robert Frank the first related artists is Timothy H. O'Sullivan, which has very little in common with Frank. The same was found with many other artist's I am familiar with. I guess it's just starting out and will improve with time, I presume if I were to create an account I would be able to feedback into the system to fix errors.

Painting seemed to fair much better in its relationships, possibly because the artists are more cleanly defined.