Arrington discusses an interview he recently saw with Yang. Without going so far as saying he should be fired, I think it is clear in his tone/language.
From where I sit, I saw no core focus and no clear product or corporate strategy. Yahoo has no idea what they want to do or who’s going to do it. I saw no charisma, excitement or leadership at all (things I’ve seen regularly from Yang in the past). I saw, simply, failure.