http://www.rcmodelreviews.com/what_is_latency.shtml.
So far this one has most details about rc radio latency.
I also read it on rctech that Sanwa's latency excludes servo latency. (The above article say the biggest latency is servo latency. it can be up 50ms.) So KO could be using narrow pluse width like sanwa and improved the decoding speed of the receiver and the servo plus dual receivers to) to improve 1ms on servo latency.
KO web site says ex1 and ex2 can utilize HCS becasue it is the high speed communication between receiver and servo. In another word, the TX can process the signal fast enough. but the receiver and the servo was too slow.. (The dual receiver and increased resolution of the pots ... is very important for consistency of our driving.... lap after lap).
Very excited to get one and see how precise and fast it can be.