To me it sounds a lot like a title fabricated to sell more books. According to the Amazon review, he also writes about techniques that atheists can use that have similar effects.

He just seems to be good at marketing - the "yawn" article seems to be another incarnation of that. I remember all sorts of newspapers picking up the "belief affects the brain" stuff, and yawning makes a good story, too.

If he has done experiments and research to see how belief of God affects the brain, then his approach could be scientific and he may even conclude that belief in God affects the brains of partitioners. Reading on Wikipedia he has also researched "non God" religions such as Buddhism - - and he has found out that stuff like meditation (and praying) affects the partitioner's brain.

And really, as somebody has noted it above: it's very plausible that belief changes our brains, given that most humans throughout our history have had belief. And research in belief is _very_ interesting and might put light on why most of the humans today believe in something.