Twitter

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When I run a Twitter search for "Pulte", I find that Twitter is full of pro-Pulte posts: sales pitches, JD Power's awards, Pulte patting Pulte on the back, etc.

However, not all of my Pulte tweets with "Pulte" in the tweet appear in a Twitter search for "Pulte". Could it be because my tweets are not pro-Pulte? Could it be that Twitter, like city-data.com, doesn't give equal sounding to all points of view? Shouldn't websites that are ostensibly "for public comment" display ALL comments, positive and negative?

Has anyone else had similar experiences?
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