manflexsrsrwy, it took nearly 9 weeks for me to hear back and get the invitation to Stage One after my application in October, so I wouldn't worry. I know others for whom it took even longer. BA, unlike many others, do actually respond to every application. It would seem that the length of time it takes them to get back to you offers very little indication of whether they are interested or not.
All the very best with the application.