The reasoning in the article is a bit off for evaluating the popularity of a website. Saying the usage has dropped in 11 of 21 isn't surprising. Many websites g

The reasoning in the article is a bit off for evaluating the popularity of a website. Saying the usage has dropped in 11 of 21 isn't surprising. Many websites gain users in a pattern of big spikes, followed by steep drops, but with the new plateau higher than the before the spike. When it's a blog, the big spikes come when posts goes viral. I'm not sure what would be the big spikes for google+ now that the public launch has happened. Maybe just a bunch of little spikes in their case.