Unfortunately I don't have access to the papers. Over the two I averaged 50% which was above average in our year surprisingly. The sorts of things that were throwing people off were things like the question asking to define using moments an object that is in equilibrium. The obvious answer is and has always been the sum of the clockwise moments is equal to the sum of the anticlockwise moments. For some reason, this year they decided that you HAVE to mention that this is about any axis. Another difficulty was the questions about uncertainty. There was a huge question the in the paper that all the parts added together was about 9 marks. Uncertainty on a scale like this has never been asked before, let alone in so much detail.
Our physics teacher (who got a first in his Phd in astrophysics) only managed to get 60/70 on the depth paper. After going through it, I definitely understand it more, the only real issue was the way in which the questions needed to be answered, but this will then reflect on the grade boundaries IMO.