Though the article notes that another poll gives 54% in favor of the initiative. That the result is sufficiently in doubt as to be a statistical tie still puts California ahead of, I think, every other state that's let the issue get to the ballot. (Corrections welcome.)

The initiative's getting onto the ballot and then being defeated is probably the best possible result, politically, since it reduces the sense of same-sex marriage being a judicial imposition against the will of the people.