There was a method developed to measure the swing of balls in games and according to this measure the Aussies achieved the following results mentioned the swing of balls in tests played in Australia against the mentioned teams:-
Australian tests
Against England (5 tests) - 0.70Against Pakistan (2 tests) - 0,66Against South Africa (2 tests) - 0.61
South African tests
First test - 1.25Second test - 1.64Third test - 1.08Average - 1.30
The miracle was how the Aussies managed to improve their ball swing abilities by near to 100% and getting the balls to start showing reverse swing from as early as over 30.