No, not according to the Snowspire Oracle.
In Fable II you can find a book called Avo is dead on the subject.
Well, it is up for debate. It is true the Snowspire oracle claimed they were a hoax, but the miracles performed at their temples, such as reducing age, and the disembodied voices, are strong evidence, to suggest they are present. Jack even comments on Gods and Demons, implying that indeed, there are Gods and Demons present.