Google+ may still be in its infancy, with only tens of thousands of users thus far, but Facebook's new competitor has created a huge stir on Twitter, according to a new study.

The Pew Research Center Project for Excellence in Journalism's New Media Index reported that Google+ was the topic of 35 percent of all news links tweeted for the week of June 27 through July 1.

The Pew study also listed other popular items during that period.

Global warming earned 11 percent of news link tweets; the hacking of an al-Qaeda website had 9 percent; the European economy had 9 percent; and Republican presidential candidate Rep. Michele Bachmann, R-Minn., had 5 percent.

Google currently caps the number of Google+ users, only allowing people on by using the you're-invited-type-of-tool, but that system seems to finicky, opening and closing without much warning.

But they must be doing something right, as the approach seems to have left people tweeting about the new social network. As the LA Times points out, however, sharing links and devoting a portion of your life to actually using  the social network are different. Ergo, Facebook reigns supreme with 750 million users.

Ironically, analysts (and bloggers) have speculated that Google+ would be a Twitter killer.  With that kind of buzz on (arguably) a rival social network, they just might be on to something.