A lot of discussion on here revolves around Google & trust or quality. I think what gets my goat as an ecom is Google could easily find this out if we signed up to share data. We accept Pay Pal & have done for over 10 years. About 5 years ago we also offered card payments. In over a decade I can count on my fingers(on one hand!) how many charge back or disputes we've had. I'm proud of that. We'd happily share that data with Google if it meant they'd trust us more. Would others do the same? They talk about trust & for ecom there are so many ways we could do that. When Google Checkout was around we had an equally good record but it seemed to go no where.
I guess it hurts when I see sites with bad reviews etc ranking higher.
Some would say the data is already being shared behind closed doors, I would probably agree with that as would others if they saw our figures but that is another thread/issue.