Disclaimer: I do not speak for Microsoft, I am simply an employee - these opinions are mine and mine alone. As someone working in the online services division I have to say that this analysis is extremely simplistic. Would they be saying the same thing about Facebook? It was in the red for many years before it became profitable. That was the plan.
It's hard for me to believe that amount of loss comes just from datacenter/development costs of Bing and Msn.