it seems like that data must be useful. I have ddg as my default search but often find myself trying google after a ddg search that doesn't turn up what I am looking for.
I know you don't want to send people away but I *want* a 'try this search in google' button. You can even put it in an iframe, or even better, would be to just have a little ajax request I could make for whatever links google has on it's page for the same search that are not showing on ddg's search results.
search for: 'foo' would have results like:
And I would be able to click 'what does google have' and `foo-zzz' will pop up.