Had both detectors mounted and in H mode on my way into work today. Have 5 radar speed signs on this trip. The 9500i always alerted first, between <1 second, and maybe 2 seconds from the front. After passing the sign, the alert remained on longer on the 9500i by 2 to 7 seconds. Note that none of the occurrences were on long straight streches. All involved some road curvature or hills.
The review from Veil on a pre-production unit indicated less sensitivity on X and K. Mine is not a formal test, but indications are it has good K band. Hopefully good Ka as well. Settings were X off, POP off and SWS off (on 9500i).