From what I hear that's a bit harsh. Reportedly, there was a conversation between Bill Gates and Steve Jobs where Steve accused Microsoft of stealing the idea for Windows from Apple. As I read the story, Gates replied to the effect of, "Come on Steve. We both stole it from Xerox." (He was referring to the Xerox PARC project where the mouse and icons were developed.)
Had Gate$ stolen the Apple source code, WinDoze would have been much better off than with the stuff he created.