Sounds about right, Tel.
Petraues has a lot of supporters on the Hill...getting rid of him without due cause was always going to be pretty hard, and he is known to have Republican sympathies and Presidential aspirations. Giving work experience to a potential future rival obviously wasn't going to go down well among the Democrats (lets be honest, Petraues is no Robert Gates), so a way to quietly retire him was needed.
It does make me wonder who will succeed him though. I don't see a lot of contenders...maybe an internal promotion? It's unusual, but not unheard of, and getting a Company man in charge may mitigate the militarization and Pentagon influence on the Agency.