Ben Edelman, an assistant professor at Harvard Business School who studies Internet advertising, reviewed the computer code on the seven sites at the request of the Journal.
"We have never seen a social space that actually works for everybody, " says danah boyd, who studies youth culture, the Internet and social media as a senior researcher at Microsoft Research.
Recent studies forecast that worldwide consumer Internet traffic related to online gaming, IP communications, online video and audio will grow 500% by 2014 . 47.5 million people already play online games in the United States , and online video viewing is up 45% over last year .
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Some studies have found that people with internet addiction have fewer dopamine receptors in certain areas of the brain, and others have suggested additional ways in which dopamine function might be impaired.
Some brain-imaging studies suggest that people who regularly use the Internet become more skillful in tracking down data and some video games appear to help players improve visual acuity.
And very recent studies have suggested how certain genetic variations might be involved in internet addiction.
One such would-be magnate is Vipin Motwani, who has combined his MBA studies at Arizona State University in Phoenix with co-launching an Internet-based food enterprise.
In one of her previous studies she found people playing a two-person monetary investment game over the internet while viewing a picture of the "second player" were more likely to trust this player if the picture was digitally morphed to resemble them.
"The truly disconnected corners of the globe are shrinking, and shrinking rapidly, " says Ethan Zuckerman, who studies technology use in the developing world as a fellow at the Berkman Center for Internet and Society.
Studies like the one one on chlamydia and gonorrhea will hopefully help flesh out the interaction between internet hook-ups and health risks so that we can better target at risk groups for preventative education.
Tech studies I have read this week imply that the iPhone 5 has a bench speed on the internet that is two or three times faster than my iPad which is not the latest iteration.
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