This article from Forbes.com on the value of random testing in both physical and retail online environments includes this one line about the VeriSign Secured Seal:
Randomized Web pages have shown online retailers, sometimes after just a few hours, that displaying a VeriSign warranty can generate more sales.
This line comes in a paragraph about A/B split testing provider Offermatica. I wonder if Offermatica can share some of those results with the world. We'd love to see them.