I can see this has already been discussed to death, but as you quoted me, I just wanted to put in my two cents.
Faith is not the ONLY factor, however, you cannot deny that faith affects culture, which in turn is ONE of the factors impacting intelligence. Genetics, nutrition, early childhood stimulation etc may be as or even more important. All that can be said of Nepal is that faith is probably not the limiting factor.
Too much religion of any kind is often not good for the brains, highly prescriptive religions are the worst offenders. If you care to google you can find religious instructions on how to wipe your @$$, I kid you not, people really do ask these questions, they need to be told the most religiously appropriate way to wipe.
Many Jews in America are Culturally Jewish but atheist or agnostic in belief. Again culture is not everything, Ashkenazi do seem to have a genetic advantage also. Last but not least it cannot be totally random that science has rarely if ever flourished together with dogmatic faith, it is one or the other.