Nielsen has conducted a study about data usage by teenagers in the U.S., which is leading them to talk on the phone less than before. U.S. teenagers have been sending out text messages more than any other demographics. Nielsen coined these changes as being a “mobile data tsunami.”

Yesterday Nielsen launched a new product called Online Campaign Ratings, designed to measure online ads the same way the company measures television campaigns. OCR works via an exclusive partnership with Facebook that turns Facebook activity into Nielsen’s metrics. GigaOM notes that the program does respect users’ privacy, and records the gender, age bracket and location of users who view the Nielsen OCR ads but leaves the rest of your data safely in un-gathered anonymity.

Facebook is planning to force unavoidable ads into users’ news feeds, without an option to hide them. The Wall Street Journal reports that Facebook plans to unfilter the feed, which will alleviate what one ad exec calls “wasted potential” but most users would call uncluttered social networking. Facebook has created the Online Campaign Rating System with Nielsen to use demographic information to create more targeted ads. There is no information on when exactly this change will occur. [WSJ via The Atlantic Wire]

New data from Nielsen shows that Android rules the OS market with 39% of the smartphone market, but that Apple is currently the #1 smartphone manufacturer, selling 28% of the devices. Struggling RIM’s BlackBerry OS only accounts for 20% of the market, and Windows Mobile comes in at a paltry 9%. [Nielsen]

According to Nielsen, half of the viewers on Netflix, Inc. (NASDAQ:NFLX) are coming from game consoles. This shows that game consoles are becoming a major source of entertainment. The number one console for Netflix users is the Nintendo Wii. Below is a chart from Nielsen:

Nielsenwire reports that Nielsen’s recent survey showed that 38% of mobile customers now own smartphones. Of those who purchased a new mobile phone in the past three months, 55% bought smartphones. The data indicates a definite trend toward smartphone purchases. Nielsen’s May survey also shows that most smartphone buyers get Android devices, but that iPhones have shown a greater growth in buyers recently. How long until smartphones are the majority? It could happen very soon, going by these statistics.

The Nielsen Company recently did some research about when e-readers, tablets, and smartphones are being used. Nielsen surveyed 12,000 people. About 70% of tablet owners and 68% of smartphone owners use their devices while watching TV. About 35% of eReader owners use their devices while watching TV. About 61% of eReader owners, 57% of tablet owners, and 51% of smartphone owners use their device when in bed.

According to Nielsen, music sales are up 1.6% in 2011. Digital album and tracks dramatically grew through May 8. Physical albums declined year-over-year from the same period in 2010. But digital albums and track purchases were up 16.8% and 9.6%, respectively. Below are some additional stats as reported by Nielsen: