That definitely could imply they have received an NSL. But as a user, when I say "they would leak that they're fighting it", I would consider that completely insufficient. If they are pulling the kind of crap you say they are, then it will come out. Guaranteed. And then nobody, including me, will ever trust them again.

editing my comment since I can't reply to hellbanner: Percentage doesn't matter, it only takes one. One person to destroy a hundred billion dollar company overnight. I am not saying "Tim Cook can not possibly be lying." I am saying "If Tim Cook lied, he just made a hundred billion dollar bet that he can keep a secret." Personally, I doubt he's that dumb.