— Nearly a quarter of Twitter account holders send tweets at least once a day, while 29 percent say they never do. More account holders say they read others' tweets daily, 35 percent.
— About 30 percent of Twitter users say they have used the service to register complaints about a product or service or when they are looking for information about services or products.
— Twitter has billed itself as the place for public, real-time conversations, but only 16 percent of users say they turn to Twitter frequently for breaking news. That said, 44 percent of users do so at least some of the time.
— Just 19 percent of respondents say they have a "favorable" view of Twitter, while 47 percent feel the same way about Facebook.
— A sizable share of Americans aren't familiar with Twitter or don't know what to make of it: 9 percent have never heard of it and another 12 percent say they just don't know how they feel about it.
—Just 35 percent of Americans say they think Twitter will be a successful company in five years. More, 49 percent, think Facebook will be successful in five years.
The Associated Press-CNBC telephone poll was conducted Oct. 25 to 27 by GfK Roper Public Affairs and Corporate Communications among 1,006 U.S. adults. The results have a margin of error of plus or minus 3 percentage points. According to Twitter, 77 percent of its 232 million monthly visitors are outside of the U.S.