I had an unusual "discussion" On Saturday Night with some "Award Winning Producer" as I was setting up room mics to mic a live band. I have always set up coincident xy with the capsules stacked one on top of each other(at 90-110 deg) so as not to shadow each other. He "Insisted" that this was wrong and that he "always" put them face to face (at 90 degrees)almost touching. This seemed counter intuitive to me but I have learned over the years I don't know everything . What are your takes? This person swears all the local symphonies do it this way etc, blah blah blah. I told him I respectfully disagree. Please respond for my peace of mind!