Google search wouldn't pick up orphans much either.
We should be aiming to improve our inbuilt search, rather than going back to using Google by default (yes, we did have all searches going through Google or Yahoo! for a long time there). Google's search has a number of critical flaws like inability to search for punctuation and automatic spell correction where no such correction is desired.
It would be nice to have boolean searching work on Wikipedia, but that's a topic for another mailing list entirely.
~Mark Ryan