statistically - police take 11 min to arrive at the scene of a crime.
statistically - do most crimes take more, or less, than 11 min after initial 911 call is made?
statistically, most police do show up afterwards. It's not their fault, it's the logistical nature of the 'law enforcement' setup. Just carry your own piece, keep your eyes open, and don't start shit, and you're good.