Google+ isn't going to catch on because social networks take too much time out of our days, according to LinkedIn CEO Jeff Weiner.

LinkedIn's leader said he doesn't think Google+ will be able to make it in a world that already has Facebook, Twitter and LinkedIn because "nobody has any free time," according to SlashGear.

Weiner says Facebook is for communicating with family and friends, Twitter is for sending 140 character messages into the ether and LinkedIn is for your professional life. There's no room left for another social network: "You introduce Google+, where am I going to spend the next minute or hour of my discretionary time? I have no more time," Weiner said at an event this week.

"Unlike social platforms and TV, which can coexist, you don't see people using Twitter while they're using Facebook, or using Facebook while they're using LinkedIn," Weiner went on to say.

Weiner's thoughts aren't shared by other social network supremos. Tom Anderson, founder of MySpace, says that he doesn't think social networking is a "zero sum game," and he hopes to see distinct networks thrive.