Google recently accused Bing of “copying results” by running a few outlier tests. I am compiling a list of links to sort of explain the Bing side of the story. I do currently work for the Bing team in BI capacity so these are public links and my personal views.
Bing team’s official replies:
Bing researcher’s personal opinion:
Explain how the Google test was conducted:
Edmond Lau from Quora (ex-Google) wrote a nice answer on how search algorithm work in this case that I think it’s close.
Anti-Google opinion from Daniel Eran Dilger
Aftermath from Danny Sullivan, Search Engine Land 5 days later: