The irony is that writers are generally meaner to other writers than critics are. Few critics have anything to gain by penning a bad review…Writers, on the other hand, have everything to gain…It's writers who have personal scores to settle; who drop their professionalism and let it rip. Critics, by and large, say what they think of a book. If they say they don't like it, that usually means they didn't like it, not that they waited for the chance to get back at a bestselling author for the luxury Tuscan villa he owns and they'll never have, or because they have wallpapered their room with rejection slips….
Lesley McDowell, "How Writers Review Their Critics," theguardian.com, September 22, 2010