*Stuart Dybek does a wonderful job explaining the difference between these terms in the latest Missouri Review.
UPDATE: Having finished the book now, I can say that in the last hundred pages or so, Gibson outshimmers and out-DeLillos DeLillo. While seeming to leave me somewhat cold, the book has stayed with me in a way that more immediately emotional stories have not--which is also true of DeLillo's work, especially Mao II. So here's Gibson:
And then she hears the sound of a helicopter, from somewhere behind her and, turning, sees the long white beam of light sweeping the dead ground as it comes, like a lighthouse gone mad from loneliness, and searching that barren ground as foolishly, as randomly, as any grieving heart ever has.