99 percent atheist, all bastard.
Has Dawkins ever stated that he is 100% atheist before this anyway? I haven't really payed him much attention. I'm not really sure whether the terminology matters that much, but atheism I thought was not having a religion, or to be godless, and that agnostic was a varying disbelief in a deity. So you could be both agnostic and atheist. I could be wrong.
Also - you can dislike religion as much as he does and still believe that a god might exist.