European travel agents wouldn't have been handing out NRA packets to tourists going to Florida when they first passed their CCW if there wasn't something to it...
It's worse than that. Lott claims to find specific drops in crime rates that enacted CCW, relative to places that didn't enact CCW. The NAS review calls that claim into question based on Lott's own data. (That said, I still oppose the Million Morons philosophically: Even if violent crime rates provably went up with CCW, I'd still be in favor of it, because I think it's immoral to deny people the right or even privilege of being able to defend themselves from criminal attack.)