I think they'll only increase the grade boundaries by like 2-3 marks from January, because the 2012 jan papers were a bit harder than this paper so:
so 2012 jan it was 39 to get an A* so here goes:
A*- 42/44
A - 35/38
B - 28
C - 21
THIS IS AN UNOFFICIAL GRADE BOUNDARY THAT IVE JUST ASSUMED BY SEEING THE GRADE BOUNDARIES OF THE OFFICIAL YEARS. :P