I'm often a little perplexed, when I read a review of a book, by the quotes that are pulled out as evidence of excellent prose. I don't think great novels are necessarily composed of great prose, or that there's a correlation between beautiful prose and the quality of a work of fiction. A really good, interesting novel will often let a little ugliness get into its words - to create a certain effect, to leave the reader with a certain sense of disorientation.