Google has recently re-formatted the display of results in Google Alert e-mails. Specifically, notice the addition of social network sharing buttons. So, please consider this an update of figure 11.3.
Saturday, February 8, 2014
Sunday, February 2, 2014
Generally this sort of thing has greater implications to the SEO crowd, but any change to the algorithm will have an impact on the type of search results you'll receive.