The only part of him going private that bugs me is that if I were in his shoes and had imminent, even possible, news that I could throw right back in everyone's faces ESPECIALLY after taking it for as long as he has, I'd maintain the ability to do so.
Perhaps for him the high road is blocking them from seeing his big announcement by a few minutes... but I think more than likely he's thinking that he doesn't see an end in sight to the barrage of insulting tweets. With that, I'm thinking another delay.