This is the thing for me.
Of course it's going to be a draw for most searches (especially the suggested ones: "math games", "coupons", "time zones"...), they're generic and easy to find.
You can use any search engine you want to find those things. Shoot, even AltaVista was good at those kinds of searches, and that was 10 years ago.
The ones I care about—even if I'm not a programmer or technical user—are the difficult searches. What if I need to find a specific car part that only ever existed in the 1972 Ford Pinto? What if I want to find a plumber who specializes in pre-20th-century homes? What if, what if, what if.
I used searches like that and more in this comparison, and it was 100% Google. I could even tell easily why it was Google, and it was pretty clear which one it was. I still chose Google (despite being basically unblinded) because it was fundamentally better at these specific searches.
That's what bing needs to compare. But will they show it? Of course not.
Edit: I did 5 more searches all non-technical but specific and picked only based on result quality. Again 5/5 google. (for those curious, the searches were: "lego mindstorms", "Mars curiosity hi-res", "home developments in myrtle beach", "used bookstores in portland, or", "top baby names in 1982"—the last one was very cool because Google also provided links to the 5 surrounding years right below the 1982 result. It's the little things you know...)