America has just spent the last 5 years torturing people and invading a country against international law with American soldiers massacring its population with impunity. It's a terrible role model for democracy.
There are several comments in this thread that would be good as a jumping-off point for the role of the Net in preventing authoritarian tendencies. Yours seemed good. Congratulations!
Let's look at a few things:
1) The US has, by law if not necessarily by practice, one of the freest flows of information in the world. There is no prior restraint (q.v. UK, Canada), there are no laws restricting hate speech (q.v. Germany), libel cases are notoriously hard to prosecute (lots of places), and judges have historically given a lot of protection to people who bring forth government "secrets" which expose wrongdoing by members of the government.
2) While I won't say there was no vote fraud anywhere, because I don't believe that, the democratic processes here work pretty well on the whole. Let's say that 99% of the voters in the US were able to get to the polls and voted for the candidate of their choice. The US is not Zimbabwe.
3) What was going on vis a vis torture, detentions, illegal declarations of war, etc. was not some big secret that you had to get from samizdat sold in a back alley. Pick up a major newspaper, tune into NPR, or even watch CNN, and what the Bush administration was doing was being lovingly documented, even if there was a lot more deference to state power than the situation deserved. And, of course, any one of a number of bloggers and alternative news sources dug in to their offenses with relish.
So, with all that access to information, Mr. Bush and his enablers won two Presidential elections and three (arguably more if you go back to 1994) congressional elections. While a lot of heat is made of potential vote fraud in Ohio and Florida, the fact is that most states were not very close. (FWIW Bush lost my state by 5% the first time and 7% the second time).
The question this poses is, if so much chicanery can be done in plain sight, with the approval of we the people in a society with some of the best access to information on the planet, what difference can the Internet make in a country without this sort of infrastructure? I would argue that if you control the primary sources of information, what leaks out around it does not make much difference. This is unfortunately a human and not a technical problem.