Interestingly, though, growth in e-readers has actually accelerated in the last six months, while tablet growth has been relatively flat in recent months after enjoying a steep ramp-up following last year’s launch of the iPad.

According to a study conducted by the Pew Internet Project, the number of adults in the U.S. with a Kindle, Nook or other e-reader doubled between last November and this May, to 12 percent from 6 percent. Tablet ownership has grown three percentage points in the same timeframe, from 5 percent in November to 8 percent as of May.

“This is the first time since the Pew Internet Project began measuring e-reader use in April 2009 that ownership of this device has reached double digits among U.S. adults,” Pew said in its report.

Around 3 percent of adults have both a tablet and an e-reader, the survey found.

Both devices still fit in the nascent category, though, well behind established devices such as desktops, laptops and digital video recorders, each of which is owned by more than half of adults. Some 84 percent of adults in the U.S. own a cellphone.

The reasons for the decline? Seasonality, the econalypse and the maturation of the market. “The second quarter has proven to be traditionally weak for broadband growth, but with the market becoming more mature, broadband adds further waned,” Bruce Leichtman, LRG’s president and principal analyst, said in a statement.

Poor broadband infrastructure and limited access to it in rural areas clearly also played a role. In rural America, just 31 percent of residents have a broadband connection, as opposed to more than two-thirds in the rest of the country, according to the Pew Internet and American Life Project. No wonder America now ranks 15th in the world on broadband access, according to the Organization for Economic Cooperation and Development.

So that $7.2 billion in broadband investments the Obama administration recently pledged stands to do a lot of good–assuming it’s put to use by the right folks. It’s not yet clear that will happen, however, because the large network operators best positioned to roll out access to underserved areas are afraid of taking stimulus money for fear of net-neutrality conditions that might be attached to it, as well as of unwanted government scrutiny.

And as Robert Atkinson, president of the Information Technology and Innovation Foundation, notes, that’s really too bad. “If you want to get broadband out, you have to do it with [those] who brought you to the dance in the first place, and in this case it is the incumbent cable and telephone carriers who have 85 percent of lines in the country,” he told the Washington Post. “This is not basket weaving. This is really complex and intensive technical stuff that takes a fair amount of sophistication and scale to be able to do right and to continue to upgrade.”

[Image Credit: Flickr/alan i am]

Obviously, that’s why they’re dial-up users.

An estimated 10 percent of Americans are surfing the net via dial-up connections, according to a report released Wednesday by the Pew Internet and American Life Project (PDF), most of them by choice. And 62 percent of dial-up users reported no interest whatsoever in upgrading to broadband.

Price was obviously an issue for some (about a third) and access an issue for others (24 percent), but 19 percent said that nothing can convince them to get broadband. Which means broadband growth in the states may be nearing a plateau. “… Solving the supply problem where there are availability gaps is only going to go so far,” said John Horrigan, the study’s author. “It’s going to have to be a process of getting people more engaged with information technology and demonstrating to people that it’s worth it for them to make the investment of time and money.”

And until then, the percentage of adult Americans with home broadband connections will continue to hover around 55 percent.