It actually does. I know because I've been testing with our app. It works perfectly. We build up a fairly large 25MB sqlite db and it doesn't show in iCloud anywhere.
In fact, if you use UIManagedDocument, it creates a .nosync directory in the document bundle to prevent it from syncing in the framework itself.
In fact, if you use UIManagedDocument, it creates a .nosync directory in the document bundle to prevent it from syncing in the framework itself.