If history is an indicator, Google should be concerned. When Europe set its sights on Microsoft and Intel, both cases were protracted and complex, costing both sides money and time. The European Commission has now opened an investigation against Google.
Google controls more than 80% of the online search market in Europe and roughly 66% of the market in the USA.
At the heart of the inquiry are complaints that Google unfairly favors some businesses over others, especially competing search services.
"Europe Opens Antitrust Inquiry Into Google", James Kanter and Eric Pfanner, New York Times, November 30, 2010.