The Blurb (n.) might as well be attached to the backs of books with velcro. They're so generic and indistinguishable in their praise, that it would be a kind of efficient recycling to pull them off of the old books and to reapply them to newly released titles.
A Blurb (n.) is about the blurb-writer and not about the book.
The Blurb (n.) is applied to the backsides of books because that's the place for butt-lickers.
The Blurb (n.) is like a bubble, little effusive bursts that the author hopes will buoy the book.
The Blurb (n.) is like a tip sheet you pick up when entering a race track. Most of what they say will be proven wrong by the day’s running (or reading).
The Blurb (n.) is the carnival barker of literature.