Why am I still waiting?Watch
If you're still in the system waiting after that then I suspect universities are keeping away from offering places, until results day and they know how many people will be meeting their offers.
I've applied to a few and been asked to send my quals in, then nothing (apart from one uni). It seems they might be hedging their bets a bit.
It sucks when you know an interview is required to be accepted in the first place.