One of the best kept secrets of American cultural life, the ascendance of Los Angeles to the enviable position of one of the most important art cities in the world, is not a secret any longer. The recent exhibition devoted to LA art at the Pompidou Center in Paris underscored the prominence of Los Angeles as one of the four major international centers, along with London, Berlin and New York, where cutting edge contemporary art is produced. A decade ago, The New York Times would rarely mention the LA art scene in its art coverage, but this is no longer the case...