I wouldn't say the poll is neck and neck considering there are 3 variations of no.
Short answer: No, I used to, but I voted "No I think" because I skimmed the poll answers and thought they were varying degrees of belief. and I am very heavily Atheist now.
Long answer(rant warning): No I don't believe, We don't know how something could come from nothing, but religion only passes the buck on that matter. I understand how religion can give comfort, I know my social anxiety didn't start until I stopped believing someone was going to magically make things better for me; but I would rather have the truth than live my life as a lie. I think if there is a spirit or a soul or even a god, it is a physical or testable thing. How else would we the people in the physical realm be able to feel it otherwise?
Maybe I would believe if I had even felt a spiritual experience, but I haven't and because of my SA giving me so much free time, I know that many if not all spiritual experience are coincidences or demonstrable tricks of the mind. At the very least I find it near impossible that any god of any mainstream religion or sect is real.
While I realize it is the pot calling the kettle black considering my SA causes, I think spirituality is about laziness and comfort zones, wanting answer that are not "We don't know yet" and "Dead people are gone forever". As for main stream religion, I think that is just plain mind control.