Re: It is easy
Let's assume that we are talking simple end users, and for the sake of the discussion let's say all they use is Word. You know the sort of person when asked what version of Windows they're on they'll reply "I use Word"
Right - turn on machine, click the Word icon on the desktop and all's well and good.
Unless they're your W95 user who isn't used to the ribbon - I had to help a couple of secretaries at a large consultancy firm who's IT department didn't seem to understand that moving from the old menu structure where the secretaries had set up lots of shortcuts for themselves to the ribbon wasn't a seamless experience.
A W95 user would (probably) be used to point and click so as far as that goes "they'd have little difficulty making the transition", however, doing something productive might take a bit longer.