Today I got the chance to do a little testing against a stationary 33.800GHz Ka source. The roads were in such a way that I would be coming around 90 degree corners towards the radar beam, which made it VERY hard to detect.
X, K - ON
SWS, POP - OFF
LASER - ON
Detector was a Rev 3.2 RX65 mounted high in a Ford Escort.
INTL mode / City - Seemed to make a a few second variance in when the detecto would alert. Sometimes the detector would seem to miss the signal for a while then jump into a 3 Bar instant-on type alert.
USA mode /City - Always detected in exactly the same spot, started off at one bar every time and then increased gradually.
INTL mode / Autoscan - This seemed to be a bad combination. I ran a different route a couple times with this setting - I was coming directly at the radar source for a longer period of time. The warning times varied greatly. On one run, I was dead line-of-sight before the detector alerted. It seemed to delay the alerts from the INTL/City runs by a MINIMUM of one second, sometimes, it seemed closer to three.
Take these for what they're worth. While the differences may not seem like much, keep in mind that the best warnings I was getting (USA/City) were only about 10-12 seconds due to the angle of the radar transmitter and layout of the streets. This was an extremely difficult test. A drop of 3 seconds when you're only getting 10 to start with is substantial in my opinion!