This has been talked about a lot in a much older, much longer thread worth visiting.
Here you will find my guess which turns out to be true.
If you are on a Windows machine, the time the print will finish only displays if your screen is sacked greater than 100%.
I haven’t used a Windows machine in a while since my last one broke and now I am Mac only, but, reading some responses p, I found a pattern.
Future thoughts should be added to that post rather than this one to keep everything on the same place.