This is not a surprise, given the difference in the way that the US and Europeans dealt with the anti-trust case against Microsoft. The company essentially “got off” in the US, while the Europeans were much more aggressive and harder on the company. So too with review of the Google-DoubleClick acquisition.
I anticipated that the Europeans would bring more scrutiny to the deal. I would be surprised, however, if they prevented it or required major concessions from Google. We’ll see.