Peppe Tech
It was late and a misread the output from ntpq -p, the delay runs about .1 to .3 milliseconds, but the actual offset is about 10 to 30 microseconds. If the device is running chrony, and the xleave option is specified, this offset drops to about 1 to 10 microseconds.
I posted the type of time servers on CU169 NTP Polling Question - #9 by jaegers49, so hopefully that answers your question.
PZ