Yes, I've seen it get down to a few milliseconds of sync on the right hardware (boundary clock on the switches, stratum 0 timeserver with pps, etc), but the pro

Yes, I've seen it get down to a few milliseconds of sync on the right hardware (boundary clock on the switches, stratum 0 timeserver with pps, etc), but the protocol only guarantees 1 second of sync. Am I incorrect in that assertion?