There is no way that GCI will allow anyone but their top brass to openly respond to this.  And institutionally, that's their prerogative.  

But it is telling that they can't even send someone to defend them openly.  Their reputation is being knocked down a peg among anyone who reads MyDD (read: much of the progressive activist "elite"), and they aren't bothering to respond.  Greg is being very fair and judicious, so it's not like they would be doing the equivalient of going on O'Reilly or anything.