Joan, the boot time is just an indication of the overall performance. I agree with you that fast boot is not the world. But where it counts is e.g. how fast webpages display or big programs get started (try Gimp or Office).

If you watch the video again compare the time it takes to bring up the sevenforums on Win 8 as compared to Mint. Look closely then you see when I click on the link.

In the video I could not demo program starts because I do not have the same program(s) installed on both systems.