it's true. The phone/tablet based communities are very active:
   I'm very active on Vine for example, but my Instagram is less
   active and less "live". Google+ can sometimes be very active if
   you happen to catch people at the same time... but the change in
   format recently made it a little strange to use. [probably
   'cause I'm used to the old format]. You can LIVE in the youtube
   comments section just about - that's like a social network all
   its own. tumblr is very live and active, if you don't mind the
   people and working their system. Twitter is.. .well, it's
   twitter. I'm on Myspace now to see what's happening (it still
   exists) and I can hear the echos. [1]http://fubar.com/ is a
   strange/interesting site. Never sure if it's a hookup site, a
   friend site, I dunno. I was hooked on it years ago when FB was
   pretty empty and I just looked and it's very active. But I think
   a lot of ppl online are in gaming chats. Steam is where you also
   find a lot of people. Also twitch.tv... hm, that's all I got for
   English sites I can think of.

References

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   1. http://l.facebook.com/l.php?u=http%3A%2F%2Ffubar.com%2F&h=TAQFXKVo6