Latest Pew Internet Survey (PDF): 73% of respondents (about 147 million adults) are internet users, up from 66% (about 133 million adults) in January 2005 survey. And the share of Americans who have broadband connections at home has now reached 42% (about 84 million), up from 29% (about 59 million) in January 2005.
Percentages vary by education and income, but no more than you might expect. No idea how accurate the survey results but I continue to be amazed at how many people refuse to believe this is happening. Or, perhaps, don’t want it to be happening. No idea why.