I have a split view app running fine on the iPad. It is using the default setup (Popover in Portrait, table view on the left in landscape). The views shift correctly once the app is running. The problem I am seeing is that when the app starts (in the simulator) running in landscape mode the UI paradigm is the one intended for Portrait mode (Master List is a popover) is what loads.
I am thinking this is some strangeness with the simulator, or I am missing an option on my main view controller.
Adding this as an answer as well in the hopes it will be more apparent to those in need of the same fix.
I solved this. I was waiting for an external XML stream to be loaded & parsed. As a result I was loading the window with the splitViewController view AFTER my
applicationDidFinishLaunchingmethod.Adding:
back into that method fixed the orientation recognition