Also please don't use the word latency when you messure time between signals this way, it is update rate you messure and it is very constant. Latency is lag time in some system components and this is not that. If this is how all data in your comparision images is created please change it all to update rate in hz, i have always thought this was something you have measured in the radio delay between radio and rx. I might have your data confused with someone else that did lots of test of the GT3B hacked firmwares.

EDIT: It was forum user derelicte that did those test, I thought your comparision table used hes values or test reults and that all other radios on the list was tested the way he did with osciloscope and measuring time from radio input to actual output from rx. My Bad