Does anybody know of solid statistical examples of websites improving CTR via rich snippets?

[southernresearch]

There has been a fair deal of broad speculation that "rich snippets improve CTR".  The recent rich snippet infographic that SEO Moz came out with mentioned this.    However the only solid examples I could find was from an example on Search Engine Land.  http://searchengineland.com/how-to-get-a-30-increase-in-ctr-with-structured-markup-105830

Does anybody know of any other success examples with solid data of improved search share CTR rates when rich snippets were implemented?

[southernresearch]

Thanks.  I'm sure there will be more empirical studies related to rich snippets.

[firstconversion]

Our SEOgadget testing https://seogadget.co.uk/understanding-how-intention-influences-search-result/

Dr Pete's testing for SEOmoz http://www.seomoz.org/blog/eyetracking-google-serps

Interestingly, Ive seen a drop in traffic for a keyword that has held position when  images have entered the SERP for another ranking i.e. we lost traffic when a competitor had an image

hope this  helps

stephen