Arrington reports that amateur hour is over at Twitter- that Blaine Cook who apparently was responsible for scaling at Twitter has left. Somehow he equates that with solving all of Twitter's problems. He is much closer to the situation than I and he may be correct.
But somehow I doubt it. From the number of problems, the way they have been handled I am guessing that the source is much more pervasive than just the lack of ability of one person. I think the general incompetence likely runs up and down the organization, and/or the base technology is just not up to snuff.
Add that to the fact that there still seems to be no way to make money from Twitter or any sign that there is a revenue plan for the future (notwithstanding the Japanese ad trial), I am guessing that tension in the organization is very high. I think the window of opportunity is shrinking and everybody there knows it.