Would it surprise any of us that Google use Elixir? 
Just like Erlang has been one of tech’s biggest kept secrets, I am convinced so too is Elixir. I would happily bet that Apple, Google and Microsoft all use Erlang or Elixir (we already know that Apple does) and I think it’s safe to say for the forseeable future it will remain being the secret sauce of many companies - they’re not going to give away their competitive advantage if they can help it 
Re the leaks, I have not looked at them in any great detail but I think many of us have suspected for a long time that they manually/artificially push/throttle results - whether that’s because of advertising partnerships or them just helping their mates. Not many people buy their canned response of “that’s what users want”. As someone who has been interested in SEO for 2 decades, I certainly don’t!
