Nick Carr is overly worried about Google:

But it's when you look beyond advertising, to the broader economic ecosystem that's coming to define the way traffic and money flow through the consumer internet, that the Google-DoubleClick deal becomes more interesting, and troublesome, from an antitrust perspective. Google is not only the dominant player in the ad-serving market (and would see its dominance expand greatly by adding DoubleClick's dominant banner-ad business), but is also the dominant player in the web searching market, controlling somewhere between 48% and 64% of that business (depending on whose data you believe). It has also, through its recent YouTube acquisition, seized a dominant share of the burgeoning market for the delivery of video online. Combined with Google Video, YouTube controls 55% of that market, according to Compete, while its nearest competitor, MySpace, holds just 15%. Google's dominance in all these areas, moreover, seems to be increasing, suggesting that all these markets may have winner-takes-all characteristics.

Here's another, simpler possibility for Nick: maybe they have better products and better marketing. I'll wait while Nick tries to wrap his head around that idea.