I guess that depends on how you define quick....
We have called 911 twice. Once when I tried to die from cardiac arrest and the other when someone was pounding on our back door at 9:30 at night in the winter (pitch black outside). both times it took emergency response over 10 minutes to arrive. That feels like an eternity and could have been fatal for me in the first instance and fatal for the "bad guy" in the second instance.
I feel for the folks that are going to respond that in their community response time would have been 30 minutes or more.
Try being on the other end of the phone. We have five deputies. Total. Day shift had one on duty, afternoons usually two. They staggered shifts all week. Most nights, no deputy between midnight and 8AM. Usually no troopers either. I'd get that call at 3AM of somebody beating on a door, or an accident with injuries, or a fight, a couple of times a shooting.
I'd have to call a deputy at home, wake them up, give them the info by phone, wait for them to get dressed, in the car and on the way. THEN there was the drive time which could easily be 45 minutes or more even at high speed, lights and siren. If for whatever reason, I didn't have a deputy on call, I'd have to call state, relay it all to them and THEY would often have to call a trooper at home. On fights, domestics, etc., EMS would roll and stage down the road from the scene, but would not approach until a deputy or trooper arrived.
230AM, phone rings, guy screaming his house is on fire and his kids are trapped inside. I hit the tones, make the announcement and wait. Wait. Wait .... did the tones go out? Did anybody hear the page ....? Do I need to re-page? Aha ... finally, somebody keys up and says page received, on the way. Then the whole get dressed, get the vehicle started, drive to the station, get the trucks started ...
There I sit twiddling my thumbs ....
Up on Long Island, our fire department's motto was; We never lost a foundation.
We called 'em 'Foundation Fire Departments'.