Comment by w1ntermute

Here's Ballmer's letter about Sinofsky's departure: http://www.theverge.com/2012/11/12/3638174/steve-ballmers-le...

Edit:

Sources inside Microsoft say a clash of personalities led to Sinofsky's departure: http://www.theverge.com/2012/11/12/3638340/microsoft-steven-...

Steven Sinofsky's letter to Microsoft employees explaining his departure: http://www.theverge.com/2012/11/12/3638770/steven-sinofskys-...