I call bullshit on this tweet. Why post the letter at all if they didn't think it was going to be picked up? After the number of times JAW/OWI has been quoted in news articles (even in mainstream press) in the last few weeks about Microsoft and other issues, they must have known the story would get out there.
I second OANST's suggestion about letting this die. And I also propose Stewart Gilray for being the game industry's next Peter Molyneaux.