Well, we see another issue here--the "boy who cried wolf" problem. I don't know Sarah Palin and--for all I know--those who claim she's a stupid liar who's dumb as a bag of rocks are 100% correct. But since the Democrats called every single Republican politician in the last 30 years a stupid liar who's dumb as a bag of rocks, this accusation no longer means anything; it's just white noise, at this point. (Of course Republicans have their own biases: they claim every Democratic politician in the last 30 years can't wait to raise everybody's taxes, for instance.)
The internet made the "boy who cried wolf" problem a lot worse. On the one hand, it it is an amazing tool, giving everybody instant access to more information than the president of the USA, or the head of the library of congress, could have gotten 50 years ago. But it is also easy to find biased, partisan, incomplete information--if that is what one prefers to look for.
So, yes, I'm quite sure that if I enter "Sarah Palin stupid" into google I'll get tons of hits. But I won't look at such "evidence" -- any more than I would look at "proofs" that are results of searches for "Barak Obama traitor". It isn't so much that I necessarily believe every single hit results of such a search is false, but the very method of looking for biased information a priori makes the whole excercise dubious at best.
If nothing else, it stinks of the sin of pride: the real point of such a search isn't to inform one of reality, but to make oneself feel good for being superior to those "stupid Republicans" or "commie liberals" one disagrees with.