Google+ has surpassed 8 million users
Based on my own statistical modelling, I can exclusively reveal to Google+ users exactly what they want to hear and that they are part of something big and popular, which by extension makes them big and popular.
By performing a deep natural language scrape of Google+ post data from a sample of, oh, hundreds of posters, I was able to compare the average mentions of cats with mentions of cats right where I live, based on how many times my neighbour spoke about cats. This is obviously an excellent basis for a statistical comparison of cat-mention-frequency or CMF for short, across the entire world.
I believe my CMF index is highly accurate. Much more accurate than any rival statistical analysis systems based on how many people are called Chuck in Arkansas, for example. Feline companions are ubiquitous across cultures and are largely uniform in distribution thanks to the competition for food resources such as mice and small cans of jellied meats.
Update: Some people complained that the average CMF index was likely to be inaccurate based purely on the CMF sample of my neighbour Ethyl, with some suggesting that perhaps she was particularly fond of her Tiddles. In order to address this weakness, I expanded the scope of the calibration corpus by recording a series of conversations from neighbours on two other sides. Bruce the bricklayer down the back, and Shelly the pot grower across the road.
Bruce has one cat and Shelly has two cats making an average of 1.5 cats. Ethyl also had two cats but one cat got run over by Bruce's pickup half way through the polling period which was enumerated as 1.5 cats. Here we can see the 1.5 cats is constant, validating the CMF base sample.
Thus I can say with confidence that Google+ currently has 8.315,292 users as I hit share.