My brother lived, worked, and traveled with muslims in the middle east for many years. I once asked him about how muslims live their lives. He said they are very "religious" as you put it when at home. But, since he traveled with them he saw them away from their homes and outside of their communities and said that anything went. According to him they (at least the one's he workded with in two different countries) are as decadent as any people he's been around but they go to great lengths to hide it.
Sounds like southern Baptist to me.