Since around last Tuesday the NTP servers in some countries (or so it appears) have seen massively increased load. We believe it's a vendor not using the vendor system
and haven't yet been able to identify who it is. It seems to mostly be affecting the United States, United Kingdom, Australia and New Zealand.
If you are running an NTP server, your service is greatly appreciated. If your server is seeing more queries than you can handle, please consider lowering the "net speed" in the server preferences
rather than removing the server altogether.
If your server can handle more NTP queries than it currently gets, please consider increasing the same setting.