i am so used to Google that i find Bing! confusing. the increased popularity may have something to do with IE promoting Bing! as the default quick search?
Google is a Giant, i don't think that in near future anyone can beat it. Bing is also good but still Google is capturing approx 75 % of total searches.
I think Google is the best option because Google search any things very easily. So I always prefer Google.
Google, of course))) Who will say: "Hey, I don't know what does it mean? Let's bing it")) Just GOOGLE!!!