Yep to FRM.
My experience with speaker tilt is the same as yours and your friend's -- you gotta experiment to find what sounds best. It's the same concept as toe-in: experimentation will determine the extent of toe-in, if any. In my case, I've tried tilt and toe-in on countless occasions over many years with several speakers, and no-tilt, straight ahead works best 99% of the time. I'm guessing my room has a lot to do with it.