I think it would be a good thing if this study could finally dispel the ridiculous notion of “the power of prayer” as somehow mechanically contributing to the health or recovery of sick people. You might also notice in the article that the object of the “prayer” is never mentioned.
God is not some genie who attends to your every wish when you rub the lamp of prayer. In a way, though, this is related to our country’s tradition of national Thanksgiving. Of course Christians (should) know Whom they are thanking–and we shouldn’t need a day off from work to do it. But a day for “giving thanks” is our (the U.S.) pretend way of feeling good about ourselves, even though there’s precious little talk about the One to whom that thanks should be addressed. Because if it’s not God, it’s just an idol. A sentimental one, but still deaf.