The average person does matter because he is the one voting and he is the one politicians need to appease.
No, because the average person has a list of priorities.
Lets say for example that a dude is going to vote for his Senator. He's heard a bunch of news in the last year, but all he really cares about is the money in his pocket. In reality, unless this person is braindead, he might end up voting for the side that he wants based on the political bias he has been subject to. But, if the next president sucks, then chances are, even with the fact he's watched FoxNews or whatever all of his life, he will be more inclined to pick the opposite side.
This is why American presidencies have never been utterly dominated by one side or another in normal conditions. The two main parties have never been entirely 'wiped out', as you could say.
For example: If the media lead France into supporting intervention, and intervention sucked, then politicians will feed on the fact that it sucked and people will rally to their side.
I'm not saying it doesn't matter, and that the average person is an idiot/is smart for only watching one television station, all that I am saying is that if someone were to watch only one type of news channel it would not make them utterly braindead. If there are two people debating in a presidential debate, then it is not like the person hearing the other side will not be able to comprehend the candidate's rhetoric just because he has been watching a media station that is biased against him.
The "important news" can also be biased.
Not really, the only important news in that would have been 'Bush elected for a second time' -- You can't bias that. You CAN bias your views on him, depending on what your watching, but it isn't as if a media station would chose to leave out the fact that Bush was elected. That was all I'm saying. It's not a strong point just part of the argument.
Overall, I think, that if any of these Revolutions are to take place, then these nations have to do their best to evoke a better sense of government in their people, since I feel that in many of these areas people feel the government is very remote from them, an entirely different sector of the country that is doing unknown stuff. Kinda creepy.