Thibs is an idiot -- he's definitely coming back -- to the detriment of his own career.
He's not even their 2nd choice according to reports. What if he sits in holding for 2 weeks only to not be chosen and the Celtics feel the need to hire an assistant coach?
He wasn't the first choice for either job, this is a smart move by him, it ensure's his job with the celtics continues.
Plus, as i said, he has to know that doc talks about stepping down after every year to be with his family. I have to think that he would be our first choice (he may not be, but i think he is) so it is smart of him to maintain his hold on the 2nd in command chair for the celtics when he may be as little as a year away from a promotion.