I usually can get everything set up in about 2 hours or less depending on how much of a rush I'm in at the time. As for the upgrade it took about 30 minutes or less to go from 10162 to 10166.. I...

Yesterday I performed a clean install of Win10 10166 and it only took around 15 minutes.. Sweet!!!

I think he's referring to a clean install not an upgrade. And I found that a clean install from an ISO is about 15-20 minutes. Very fast!!

3.. that's true with Win8.1 as well.. nothing to fix really. Just reset when installing the OS.