From their report:
The share of adults in the United States who own tablet computers nearly doubled from 10% to 19% between mid-December and early January and the same surge in growth also applied to e-book readers, which also jumped from 10% to 19% over the same time period.
The number of Americans owning at least one of these digital reading devices jumped from 18% in December to 29% in January.
These findings are striking because they come after a period from mid-2011 into the autumn in which there was not much change in the ownership of tablets and e-book readers. However, as the holiday gift-giving season approached the marketplace for both devices dramatically shifted. In the tablet world, Amazon’s Kindle Fire and Barnes and Noble’s Nook Tablet were introduced at considerably cheaper prices than other tablets. In the e-book reader world, some versions of the Kindle and Nook and other readers fell well below $100.
About the Survey
These results come from ongoing surveys by the Pew Research Center’s Internet & American Life Project aimed at tracking growth in the ownership of both devices. A pre-holiday survey was conducted among 2,986 people age 16 and older between November 16 and December 21, 2011, and has a margin of error of +/- two percentage points. Telephone interviews for the pre-holiday survey were conducted in English and Spanish, by landline and cell phone.
The post-holiday data come from the combined results of two surveys – one conducted January 5-8 among 1,000 adults age 18 and older and another conducted January 12-15 of 1,008 adults. The January surveys were conducted on landline and cell phones. They were conducted only in English. The combined surveys have a margin of error of +/- 2.4 percentage points.
You can see the full report online or download it here.