Hey, I attended their Open Day (25th Jan) and they said they aimed to get back to people 2 weeks post-test feedback. Someone mentioned that they had received their test results in December and not heard back yet, and Mark the Grad Rec guy looked surprised and said to drop him an email about it. I was in a similar situation so decided to email too the next day. I still haven't had a reply to that email, or a response to my app.
So I reckon they are just swamped? A lot of people seem to have been waiting ages after their phone interviews too, so would make sense.