This begins to get into the question regarding what guns were purchased for CCW and what guns actually get carried. G19 is on this proposed list a few times, and for good reason. They are in a decent caliber and the gun itself works. I personally don't like them, but that's beside the point. A lot of people do like them. A lot of people bought them.
But when i see how many threads here, on other forums and discussion among my acquaintances, I get the distinct impression that many of these "CCW guns" were purchased, carried for a short time and then retired while the purchaser looked for something smaller, lighter and less bulky.
I am an advocate of carrying the largest caliber, in the largest frame that you can conceal. Realizing this is different with everyone, real world CCW will range from a full size service pistol to a Kel-Tec or LCP. But many seem to go out of their way to get right into the smaller guns, simply because they view them as being less intrusive into their daily routine.
Most people are unwilling to change anything at all and simply write off mid size to full size guns as non-starters for CCW. Thus, I do not think that the G19, or even my personal favorite, the 1911, is on the list of most popular. With the advent of truly small handguns, I seriously doubt the esteemed Chiefs Special is even high on the list. It's a snubbie, sure, but it's also an all steel revolver. I'm willing to bet that most of them have been, along with the Glocks, pressed into nightstand duty.
Such an experiment would be impossible, but I have a theory. Find 100 people who claim to carry a mid size to full size handgun for CCW and randomly spot check. I'd wager money that 60% of them have the supposed CCW at home and are actually carrying a polymer .380 or 9mm pocket gun, if they are carrying at all.
Here at THR we are a little ahead of the curve, we actually read and discuss our interest in firearms, including CCW. The average gun owner views it as a magic talisman which prevents them from getting the short end of the stick. Who needs to practice with magic?
In short, the lists proposed previously are a likely overview of guns purchased with the intent of carrying. But for a list of guns actually carried, simply make a list of the smallest, lightest handguns chambered in calibers ranging from inadequate to barely adequate.