Thanks for bringing up the crucial point
about the importance of being able to detect brief reflections of radar farther down the road
from longer instances of IO or CO radar. I suspect this scenario will occur even more frequently than possibly quick triggers themselves.
One recent article published does indeed discuss this and also provides a video demonstrating the effect and how quicker detectors can alert to it while "slower" ones do not. Veil Guy: The Most Lethal Form of Police RADAR and How to Protect Against It
Unfortunately, other than the real-tests conducted by myself and the Veil Guy, all other "controlled tests" and/or reviews to date simply test for range (and sensitivity) to constant-on radar. I hope this changes one day.
This leaves out a huge part of the equation when it comes to overall real-world performance, as quickness to alert is an especially important performance attribute of any dependable detector, something, that I know, you understand all too well as Whistlers are some of the quickest detectors