Google Plus is a latecomer to the world of social networking but its a new website, Google+ is growing much more rapidly than Facebook, Myspace and Twitter did in their early days, technology experts said Tuesday.

While Google+ may be the fastest-growing social network ever, it remains to be seen, however, whether it can pose a serious threat to the social networking titan Facebook, which has more than 750 million members.

During a panel discussion on Google+ hosted by Wedbush Securities, Lipsman said it took other social networks much longer to reach 25 million users: 22 months for Myspace, 33 months for Twitter and 37 months for Facebook. "Obviously, this is a very strong growth trajectory," Lipsman said.

He cautioned, however, that Google "has a really large user base it can build off of" with its one billion users worldwide.

And it still has a "really long way to go to be competitive with Facebook," Lipsman said.

"Google+ is the fastest by a long shot but it's important to realize that fastest may not always be best," he said. "Sometimes, that slow build can lead to a strong network effect that pays long-term dividends."

Most Google+ users -- 6.4 million -- are in the United States, followed by India with 3.6 million, Canada with 1.1 million, Britain with 1.1 million and Germany with over 920,000, according to comScore.

In unveiling Google+, Google stressed the ability it gives users to separate online friends and family into different "Circles," or networks, and to share information only with members of a particular circle.

One of the criticisms of Facebook is that updates are shared with all of one's friends unless a user has gone through a relatively complicated process to create separate Facebook Groups.