Cameron vs. Brown in the blogs

The last 30 days has seen both Gordon Brown and David Cameron take centre stage at their respective party conferences.

Both have gotten fair attention in the blogsphere, but they have not fared equally well.
The figure below shows both the number of blog posts made on each day during the last 30 days that references any of the two. Notice the spike in number of posts about Gordon Brown during the Labour conference and a similar increase in posts on David Cameron during the current Tory conference.

The figure also shows the sentiment of the blog posts where they are referenced. The trend of the sentiment graph (in the legend referred as NPI) is negative if there are more negative posts than positive posts and vice versa.

Notice how Brown’s sentiment graph dives during the party conference whereas Cameron’s does not.