I'm finding everything from three minutes to twelve depending on the type of emergency and location. So I'm starting to suspect that pro-gun claims of thirty minutes are like claiming Yamamoto made the rifle grass quote or that the FAWB is just about rifles that look like assault rifles. Not to mention that if you want better response times? Hire more cops. Probably wouldn't cost more than putting armed guards in every school and law enforcement officers wouldn't just be guards.