My observations agree with Beat's statement. I'm a concealed carry license and do carry. I shoot but do not train. Unfortunately, the majority of others in my category fit my profile. As an aside--one point that the famous Jeff Cooper made was that shooting by one's self is a poor training idea. I never understood this comment until I "trained" on a firing range with 25 other people.
About police readiness. I fear that worldwide criticism heaped on US police about so called improper shootings may have or will affect cops' mindset about using their weapons as they have been trained. Hesitation could become a universal reason for more police officers dying in the line of duty. Also, I predict that future training manuals with new procedures will be introduced. As soon as they are implemented, new rules of engagement will become policy. I would not be surprised to learn that officers will be advised to retreat from situations that might require use of deadly force. Eventually policy might require this step. As a civilian I decided long ago to retreat if doing so would not cause me or my wife injury. The big obvious difference between my predicament and a police officer's is that he or she was sent there to rescue, prevent, or resolve a serious issue. If he or she decides to retreat, somebody else(me, you, whoever)might be stuck there in one hell of a jam. That's the conundrum here.