We just found some interesting third-party research from the Baymard Institute regarding consumer’s perceptions of SSL and Trust seals. The survey, from January 2013, specifically focused on e-commerce websites and gave the following results, showing Trust seals outpacing all of the SSL seals with the exception of Norton.
It is an interesting article and I recommend clicking through to read more about the results and some of the implications. Including their suggestion sites show multiple seals to increase perceived site security; while also of course improving site security.