> If the average response is < 1 sec than a 60 second standard deviation means that many responses are being made before the query is sent.
Imagine if 99.99% of queries take 1 millisecond, and the remaining 0.01% of queries take 6000 seconds. Then the mean is 0.6010 seconds and the standard deviation is 59.997 seconds.
(Muphry's law strikes again...)