By making Google+ available to a very limited set of initial testers, Google is showing that it learned its lesson from the privacy fiasco that followed the sudden, widespread launch of its Twitter-like Buzz service, which earned the company boos and lawsuits from end users, and investigations and fines from government agencies for unilaterally and publicly disclosing previously hidden Gmail connections.

The conservative approach to Google+'s availability is allowing Google to gather valuable feedback and patch bugs, , before making the site available to a mass audience, when glitches would have exponential consequences, experts said in e-mail interviews.

It is a welcome sign from a company that has also caught heat from privacy advocates and government watchdogs due to its now ended but years-long, unintended capture of e-mails, passwords and Web traffic from unprotected WiFi networks by the cars that take its Street View maps photos.

"I think it is very smart of Google to restrict Plus to a 'limited field trial' -- they aren't even calling it a beta. Google made a misstep with the roll out of Buzz. They've already avoided that mistake with Plus with this limited release. And because it's so exclusive, tech savvy individuals are fighting to get in -- just the type of folks that you want as beta testers," said Sean Sullivan, an F-Secure security adviser.

"Clearly there are some bugs to be fixed. I think Google will do so quickly," he added.