just as a reference, got a P90 with a trigger master and a custom G&P m120 turbo motor and I'm getting 33 BBPS on an 11.1v LiPo so theres defo something off there on your s:S - hell i get about 25 BBPS with the EG1000 motor still on it :S
sounds like the BPS meter on ur Iphone is wonky I'd say