Could it not be that he simply has better batteries so are less stressed and last longer?
His Thunder Power G6 65c batteries seem to capable of supplying 250A continuous and 500A burst (65x3.850 and 130x3.850 respectively) whereas yours seem to be able to supply only 156A continuous and 208A burst (30x5.2 and 40x5.2 respectively) assuming that there are 30/40C Turnigy batteries like these linked below:
http://www.hobbyking.com/hobbyking/s...dProduct=10277