30-60 minutes is a very long time, do fire departments normally take that long to start dumping water on the house? Some site says "NFPA Standard 1710 establish

30-60 minutes is a very long time, do fire departments normally take that long to start dumping water on the house? Some site says "NFPA Standard 1710 establishes a 320 second or 5 minutes and 20 seconds 'response time' goal for not less than 90% of these type incidents."