In general, bloggers are posting more positive opinions rather than negative. Between January and February of this year, only 27.8% of blog posts had a negative "tone" by the blogger. Click on pie chart to enlarge.

*posts about 17 leading national retailers were tracked

While negative blog posts take up almost 30% according to the graph below, only 4% of Internet users use blogs as a source when considering purchasing a product. Click on image to see full breakout of sources.