The test that ABC did is not valid because the shooter knew in advance who the CCW'er was. The shooter in the video spends about two seconds shooting at the instructor, then goes directly for the armed student. The entire point of CCW is that the criminal doesn't know who is armed.
The idea that law enforcement is constantly practicing their gun skills and crisis situations is far from the truth. The amount of practice law enforcement gets varies widely across agencies, but it isn't unusual for police to practice with only a hundred rounds twice a year (exactly what the NYPD gets), or less. I personally sometimes go through one or two thousand rounds of aimed fire in a weekend. The last time I walked by the Walnut Creek Police Department's pistol range, there were weeds growing everywhere and a picnic bench was in the middle of the range. By contrast, the range I go to in Concord looks like it has tunnels being drilled through the hill that serves as a backstop.
The newspaper headline calling LaPierrce the "Craziest Man on Earth" and a "nut" is a good example of the strong anti-gun bias of the media. Does anyone think they are going to get both sides of the story when editors like that run the mainstream media? Also note the complete, 180 degree twisting of the truth--it says that the NRA is blaming everyone else within 90 minutes after, when the NRA was the only side that kept calm for a week before holding a press conference.
California is not a shall-issue state so there aren't many people who CCW, so I can see why some people here think it is a "fantasy" that CCW'ing works. But I think 40-41 states currently have shall-issue CCW, so there is no need to hypothesize. Citizen concealed carry is a thoroughly proven success. Criminologists have found it to be the case, and even the more cursory studies show how effective is is. Take a look at this one on rampage shootings, which found:
Average deaths when stopped by police: 14.33
Average deaths when stopped by civilian: 2.33