OK sit two people down, one at a MS Windows PC one at a Mac PC.
Explain to one the 'Alt _' concept, explain to the other the various Mac methods and leave them work out stuff for themselves for a couple of hours.
Now sit two new people down and have the first two explain the methods they've used. Who do you think is going to be up and running and being productive first?
...
Doesn't work
and if it did how many extra keystrokes did I just use over the Windows method??
I would say the Mac would be easier for a new user to explain to another new user, because of how the menu items are more standardized.
Throw a new app at the Windows user and he will spend extra time finding where the underscores are because the commands are slightly different. Quit might be replaced by Exit, Preferences might be in the Edit menu or the File menu, etc.
Throw a new app at the Mac user and he can probably port many of the same skills he learned with minimal thought. There is a reason Mac users complain about apps that don't follow the Apple UI guidelines, or when the keyboard shortcuts are different than expected (rare, but it does happen. Open-source apps, I'm looking at you.)
For either new user, the mouse is probably faster because they probably haven't learned to touch-type and would spend half their time looking at the keyboard, which takes away a lot of the effectiveness of keyboard shortcuts. Telling them only how to Alt+underlined letter+other underlined letter won't help.
As for the other thing, extra keystrokes are cheap. The new user won't mind having to press the arrow key multiple times as long as all they have to remember is (key combo to highlight menu, arrows to move around, enter to execute). And that works regardless of OS.
netdog, I never used Bob and I don't plan to start now. And Clippy made me want to melt down my box of paper clips and make bullets to shoot myself with.