I've googled for this, but I've not been able to find the answer. Hoping one of my fellow Arsians will have the answer: I've noticed that on many Cisco switches (and I assume this applies to routers ...

Local clock inaccuracy is so miniscule as to not merit mention with respect to NTP. (around three orders of magnitude difference). Click to expand... For bare metal, yes. For virtual, no. Fire up ntpd ...