Milliseconds ??? You might as well say they lasted only for centuries.
OK, now somebody tell me they actually did last for milliseconds. What do I know?
I got the feeling that the author didn’t have a clue regarding the subject to which she had been assigned. The way she was throwing around terms like “millisecond” and “microsecond” - I’m not certain if she knew that these words have actual, unambiguously defined meanings.