Opinion? OK, opinion:
No it doesn't.
Mayhaps it could work better, but, they've been working on that. Maybe not to please everyone, but I wouldn't say everyone outside a niche of a niche of users use computers for insane things. lolwut? OKIE....
I'm sure ubuntu drives you nuts. That's fine, but then again, so does the Office ribbon for some people. Including me. However, I'm open-minded enough to admit the Office ribbon does seem to be a bit more optimized for certain things. I just wish they'd kept the menus accessible by all the old keyboard shortcuts in Office 2010.