I found that I was not able to take the test fairly, because it was blatantly obvious from the style of the search results which one was Bing and which one was Google. The Bing results use a slightly duller green for the URL displayed underneath each result's title, among other stylistic differences.
So, the comparison is completely useless, as they did not anonymize the style of the results, and thus either conscious or unconscious bias can creep in. I expect that for users that are not aware that the results look different, there will be a significant preference for the results that they see every day (e.g. the engine they normally use).
So, the comparison is completely useless, as they did not anonymize the style of the results, and thus either conscious or unconscious bias can creep in. I expect that for users that are not aware that the results look different, there will be a significant preference for the results that they see every day (e.g. the engine they normally use).