Sorry, we were too busy on G+ to worry about first post....
"The Wall Street Journal has the hard, unfiltered truth"
Yeah, except it doesn't count mobile users. G+ is mostly cutting edge geeks who are using the app at least as much as the website. It doesn't define which users it is counting. Is this counting active users, signed up and never returned users, who? Considering anyone with a Google account now has a G+ account, the numbers can easily be far off what the active user numbers would be. If they were testing me, and testing mobile, I'd easily clock in about 8 hours average a day (always checking on phone, commenting in discussions, on tablet, on at work, etc.)
Also, many of us geeks got family to join. We all but boycott Facebook, so they have to log in every once in a while just to check on us, but never interact.
From personal experience, I have 1000+ followers, follow 200+, and it take me more than 3 minutes a day just to get through the first page of posts. Also, I hyper share with G+, because it's people I share interests, not genes, with.
Compared to Slashdot: I've posted more interesting stories than Slashdot had today. I've read more interesting stories separately as well. I've had better discussions that on Slashdot. Millions of users, only a couple thousand posts per day... Maybe the Slashdot crowd shouldn't be throwing stones. Reading all the blurbs, I could easily fit Slashdot into 3 minutes a day or less.
Besides, many posted this story before it was on Slashdot. Became old news quick, already fully parsed, dissected, and discussed. Glad to see /. catch up to G+, and then poo-poo it, lol.