"This is Facebook both responding to Google's announcement and pointing out to the market that Facebook has at least a 749-million user lead over Google+," Olds said. "And Facebook also is signaling that they aren't going to stand still and watch Google+ come on. So, yah, they are taking away some of Google's momentum."

While Google and Facebook have been competitors over the past year, Google's introduction of its own social network raises the stakes to a new level.

And that is where comes into the mix.

Microsoft and Facebook for several years, and Microsoft in the social network in 2007. That was a fortuitous move, which has made Microsoft and its partner Facebook common enemies of Google. They can work together to battle Google, and the Facebook/Skype deal is proof of it.

In May, Microsoft agreed to for $8.5 billion. While the deal hasn't closed, upon news of the upcoming buy, there was immediate speculation that Facebook would benefit from it.