On the back of The King's Peace, by Jo Walton, is a blurb by someone named Debra Doyle. It says, in part, "The King's Peace is the novel that The Mists of Avalon should have been."
Way to take a swipe at MZB. I think it's because it's an Arthurian story with a strong woman protagonist, but a little more historically accurate, maybe? Not sure, but great.
I read a contest in a fantasy magazine once for the best blurb that you'd give if you hated the book but didn't want to insult the author. "As tight and fast-paced as Tolkein!" "This author could not have written a better book." Etc. I wish I could think of some more. Anyone?