Excerpt from an extensive Facebook/Google competitive profile
Like Bill Gates a decade or so earlier, Page is seeing his company's grip on the tech world loosening. So he's fighting back with a mammoth effort to grab a piece of the social web. His first substantial act as Google's new CEO was to amp up the considerable financial and engineering mojo the company had aimed at Facebook's turf by releasing Google+. It's not Google's first social initiative, but it's the one that folks aren't laughing at, and Google says 40 million people have signed up in only four months. Across town Zuckerberg knows Google+ is the first credible threat Facebook has faced since it sailed past MySpace to become the world's No. 1 social network. (For Facebook there are more than bragging rights at stake: Anything that tarnishes its halo could impact its long-awaited initial public offering with a valuation that is expected to top $80 billion.) Not surprisingly, shortly after Google+ made its debut, Zuckerberg flipped on a pink neon sign at headquarters with the word lockdown, signaling that employees were on notice to work around the clock on, among other things, replicating some of the most praised Google+ features.