No!
Well, to be honest, most of them have been quite good.
I've already bitched enough about Black Sun Rising; Juliet, Naked was okay, but not great and The Man in the High Castle - which I've just finished - was a little disappointing (I don't think I really like Dick*).
On the plus side I did enjoy Wild Sheep Chase, as well as The Gum Thief, but my two novels of the year so far would have to be One Day and The Death of Grass.
*You can stop that sniggering now.