@jgherbert: I do know what you're saying -- although, personally, I like to think of myself as a power user with a "regular person" mentality. In any case, I do feel that UI changes like the ribbon tend to hurt the power users most while at the same time making it more difficult to become a power user.
(My favorite case in point -- the leap from MS-DOS 6.x/Windows 3.x to Windows 95/98. I have fond memories of the days of MS-DOS when I knew *EVERYTHING* about my computer (and the few things I didn't know were easy and fun enough to experiment with and find out -- sometimes at the risk of very easily accidentally destroying everything, sure, but still).
I want UI changes to be a very clear improvement -- or, at least, not a clear detriment (beyond getting used to change).