Hi,
which version did you use for your above measurements? There are two different versions: sequential/non-sequential, which can be found here:
http://blog.digitalise.net/category/programming-scripting/cplusplus/win32/
This is how i usually start the RInput.exe (inside a .bat file)
@echo off
start steam://rungameid/730
timeout /T 10 /NOBREAK >nul
start "" "C:\Program Files (x86)\RInput\RInput.exe" csgo.exe
timeout /T 1 /NOBREAK >nulexit:
Hope this helps. Really interested for the result you get.