I'm often wondering myself, "where are you guys going to Church" when I hear these stories. I just don't see this type of crap.
I've been in quite a few "mixed" wards. For example, in Los Angeles, there are a some wards in which you will see and hear members shouting "Hallelujah!", "Praise God Almighty!", and the like during fast and testimony meeting and then have a perfectly "normal" rest of the block.