Yeah, I'd say it's 50/50 on whether a pretzel gets served with mustard or cheese in my experience, and I almost always try the pretzel when it's on the menu. Sometimes you get both. Assuming we're talking soft pretzels. Hard pretzels, idk.
I mean it was always normal for me, I also dip them in ranch and have been looked at weird for that too. Idk man. I got downvoted for answering the question haha.