My last interaction with an armed citizen went smooth as silk. He had his hands on the wheel when I walked up and told me "sir, I just want to let you know I have a Kentucky concealed carry permit and the gun is with me." I asked where it was and then told him just to leave it there. When I asked for his license and registration he told me where they were before he reached for them. When I walked back up to his car the second time he seemed a lot more relaxed. I gave him a warning for speeding and told him I was glad to see responsible citizens carrying and I appreciated him letting me know.
I'm not relating this story for a pat on the back, but rather to say that absent other circumstances it doesn't need to be any more of an issue than that. I've always understood the wording in Terry to be "armed and presently dangerous." I assume they put the "and" in there because they felt that "armed" doesn't always mean "dangerous."
He respected you from the 1st moment and you treated him the same. Way it should be.
If you open up on LEO with attitude you will most likely get it back in spades.