I really wish they'd get rid of that awful 'ribbon' in the file explorer. It's very practical in Office applications, but for a file explorer it's just a bit too much, imo.
The only thing I noticed is that some people don't understand the difference between "cut" and "copy", or why the mouse drag&drop sometimes produces the former, while other times it produces the later. But these are separate things entirely that can't be solved by ribbon shortcuts.
I can also believe that most users can't do select all or stuff like that; I've seen far too many regular folk copying one file at a time.
http://blogs.msdn.com/b/b8/archive/2011/08/26/improvements-i...