AU is linked directly on Ubuntu support page (http://www.ubuntu.com/support/community) and during installation so I can't agree with rejecting questions not showing "google effort". Google is not linked on Ubuntu support page and doesn't have a menu bar in its top with "Ubuntu" "Community" "Ask!" ... menus like the one we have here.
In my opinion, the point in asking/researching on AU (and SE in general) is that you can trust the answers and that is not the case with google results. Am I wrong and we don't want this trustable reputation here?
I think if we follow this line to its end, you can find almost ALL answers with Google search and you don't need AU at all... but AU is there and working because it provides answers that are trustable and work (if not, usually the upvote/downvote/accept system and comments correct that).
This is what a lot of users seek... Not all have time to test a dozen possible "solutions" or the knowledge to see if a solution is good or not whithout testing it or to get back to the initial state after a failed "solution" test.