Twitter and others are complaining that Google is throwing its massive 65 percent plus market share weight around and quashing smaller competitors. The reason Twitter and others are so threatened is that the pattern of shared links within Google+ provides a decent enough indicator as to what links are interesting. What's important is what's trending, and algorithms can get a sense of that with just a subset of everything that's getting shared on the Web.
The most interesting aspect of Google's move, however, is its tacit acknowledgement that its stalwart search links are largely irrelevant and might as well be replaced with social results. Google search results are
essentially gamed results produced by search optimizers.
Read more
here.