I think you've misunderstood what you read. Under US law an FAA order carries the same compliance burden as a warrant. And, just like a warrant, the party served can push back on an overly broad or unjustified order. So, there's nothing untrue or even remotely misleading in the statement that "the only way in which Google reveals information about users are when we receive lawful, specific orders about individuals -- things like search warrants."