Since there really aren't too many instances of a 64-bit OS X running these days, it's kind of moot.
"So, should Google be worried? Not just yet. But it's good to see that there are companies out there trying to carve out a segment of the market. Competition means that search tools will continually improve, and that's good news for all of us.
Real Users are afraid they'll break the machine -- but they're never afraid to break your face.