Probably not the last we’ll hear on this topic.
FWIW, I just searched for “Google: Bing is Cheating” with both search engines and the results differed.
Google made the claim Tuesday after releasing the results of a test it carried out purporting to show how Google's results for search terms were copied weeks later by Microsoft's Bing search engine. Amit Singhal, who helps oversee Google's search engine algorithm, called Bing's behavior "cheating."
In response, Harry Shum, a Microsoft corporate vice president, wrote in a blog post that Google's claims were misleading and amounted to a "spy-novelesque stunt to generate extreme outliers."
"We do not copy Google's results," a Microsoft spokesman said.