It's probably not good that I measure the quality of my group prayers by the number of grunts of affirmation I get. What are those? A grunt of affirmation is when you pray in a group and someone near you says, "Mhm" or "Unh" or some other grunt like statement that means, "I'm down with that."While not everyone uses the prayer grunt, I remember the leader of my bible study during my senior year had that habit and I often found myself looking to make a good prayer at the end of a study in order to get that "warm manly." I think I may have subconsciously adopted it myself for a while when I was a small group leader.
Is it a little idolatrous? I don't know, but I suggest you avoid memorizing his prayer grunt score sheet just in case.