Possibly, but probably not. Who vouches for your "insider"? I realise this may be an annoying answer, which is not my intention, but try and see it from my point of view. How could I possibly trust such a chain of information. I don't even know you from a bar of soap, or Jesbass, for that matter, let-alone your "source". And even if you told me your insider was, say for example, Tony Iro, how could I possibly know this to be true. I'm a skeptic, but please don't take it personally.
For what it's worth...
You've never met me but you know who I am courtesy of fundraiser/writing duties.
I've never met NU but I've spoken to him on the phone.
I've never met the insider in question, nor can I confirm that he and NU are related, but as they have the same surname and that surname only has 200 residential phone listings nationwide, I'm more than willing to give him the benefit of the doubt on the back of that, and his word, and my dealings with him.
Whether you want to join me in that is your prerogative, but...
...saying that Iro lays down the law doesn't actually address the argument that Cleary is or isn't coaching for mediocrity. He's very stoic in his conversational manner, and the risk is that people interpret his delivery as his message.
Ultimately, I believe that NU has a source and that this source is who he says he is - but I'm not at all convinced that Cleary coaches for mediocrity.