There used to be a bug where it was milliseconds instead of microseconds, but I think that's fixed in 9.7P3. I don't believe that change is possible without a change in code itself in ONTAP. Just move the decimal in your head 3 places as a microsecond is a thousanth of a millisecond, or millionth of a second (1000x difference).
Are you saying Unified Manager doesn't show like 1-2 ms of latency?