Because most people don't do online to post good experiences about being pulled over. I'd wager that much closer to 100% of people will be posting their experience and/or retaining a lawyer after some of the bad treatment episodes out there.
What I was trying to say, though, was that I have read a lot more stories of people being treated badly by police after they disclosed their permit and gun to them than I have read of people being treated badly by police when they just kept quiet about it. So, it would seem to me that you have less of a chance of being treated badly by not mentioning the gun or permit when you are not required to by law.
I do the following things:
1. Turn on hazard lights when the officer lights his lights to indicate that I see them.
2. Retrieve my driver's license from my wallet, and the folder with my registration from the glove box.
3. Seek a place off the busy street to pull over such as a side street, parking lot, turnout spot.
4. Turn off the engine and radio.
5. Turn on interior lights if at night.
6. Roll driver's side window all the way down.
7. Left hand rests on window sill with driver's license in hand - folder with other documents is on my lap. Right hand on steering wheel.
8. Greet the officer pleasantly and offer pleasantries during initial contact.
9. Remain polite and professional during entire encounter.
If that isn't enough to contribute to the officer going home safe at the end of shift and "put them at ease", then handing him a permit that he doesn't know is valid or not without checking and telling him about my gun that is safe and secure in it's holster isn't going to add anything. I have never had a police officer, during a traffic stop, treat me in any way other than politely and professionally.
I won't use what I had to do to satisfy the government in order to exercise my right to self defense as a bargaining chip to help me get out of the ticket I likely deserve to get anyway.