Bing has never denied using clicks on google search. They have, in fact, admitted to using clicks in general before Google even began their experiments. Given that information, why should it be surprising that Google Search, as one of the most-clicked sites on the Internet, has a big impact on that?
Surprising or no, it's clearly pretty controversial. If you are using click data like this, you have to know that you'll end up essentially copying Google. People only click on the results that are there, and Google puts them there.
Of course it's controversial. Someone made a deliberate decision to stir up controversy over this. It's easy to make some controversy if you just use the right words. Words like "Cheating" and "Copying" are great for that.
If you really want examples, just watch Fox News or MSNBC for fifteen minutes. You'll probably see at least one or two examples in there somewhere.
