Interesting articles, as was the one on how sensations interpreted as religious experiences can be created by stimulating the brain with electromagnetism. These articles don't really answer your question, though.
Dr. Newberg has determined what kind of brain activity occurs during certain religious practices. The article seems to assume this means that people in religious faiths have some kind of innate ability, and that leads them into religion, whereas, atheists do not. The test subjects he chose had practiced these activities frequently for perhaps several years. Couldn't this just be something the brain has been trained to do? The brain has been engaged in a specific activity repeatedly long enough to adapt to the needs associated with the activity. I wonder if he could find the same results in brains of atheists engaged in non-religious activities.
While some religions place much emphasis on experiences and sensations—what is felt—any kind of research in this area will have a harder time with Christianity. Christianity has, for the most part, grounded its claims on the accounts of historical events and their interpretations of the events by those directly involved. The significance of experiences and sensations is downplayed, in some cases even denied, as confirmation of doctrine. A feeling that a Christian may claim as evidence of God may also be claimed as evidence by another for a different deity. This research shows us that we do need to exercise caution about how we interpret the experiences, for it may not be something unique to religious practice at all. Interestingly, this comes at a time when the move in Christian circles seems to be towards the experiential, perhaps partly as a response to the need for confirming experience, and parly in response to increasing criticism of the reliability of the historical accounts in the Bible.
What really addresses your question—at least in regards to Christianity—is whether or not some people are naturally more inclined to accept and hold information received from others. Why, indeed, to we have scholars on both sides of this issue? The same evidence is looked at by different people, and they come to different conclusions. Is this related to something innately in the brain—something in the DNA—or is it based on life experiences? Or some combination of both? Is it like drinking alcohol or smoking in that some say "Yes" and some say "No" to the opportunitites?