I don't think it's ever a good idea to make a headline more sensational. We should wait for a response from Microsoft before declaring them liars/cheaters. It's entirely possible that Microsoft has a valid explanation.

Personally - on at least two occasions, I've been accused of writing code that was specifically written to cause grief/problems with another person, only to have to explain that it was a bug and that their personal test-case isn't the only place where it fails.

* And even if the author did directly accuse MS of cheating, that doesn't mean we can't be more correct and rewrite it to be neutral.