I don't see what the point of the article might be (except as click bait to get ad views, of course). I had exactly the same training when I worked at IBM, every year. "Never talk about dominating the market", yadda yadda yadda. It's sound legal advice that I would expect all corporate employees would get. VMWare won't want their employees to talk about how they dominate the VM indusrty; EMC wouldn't want their engineers talking about their enterprise storasge arrays "crushing the competition", and so on.

And at all companies, the standard line is, "never send in e-mail anything that you wouldn't want to see on the front page of the New York Times, or might cause you to be deposed as a witness in a courtroom." And it's not just about anti-trust; you also never want to talk in any kind of discoverable medium how an engineering short-cut in the development of your product (say, like a 737) is going to cause people to get killed.

All of this is not unique to Google, but applies to any company with half-way competent lawyers and a half-way competent HR department.