It is good to hear from you! The speed sensitivity has two stages.
At approximately 15 mph and under, the detector will detect the signal, but will not report it as an alert and will remain quiet. At approximately 16 mph and above it is at full sensitivity.
The marked Location also looks at speed. A Marked Location will provide around 1 mile advance warning as you approach the Marked Location if you are traveling at highway speeds, generally considered to be above 50 mph. If you are driving on near-by roads to the Marked Location - not on the interstate and traveling at lower speeds - the 9500i will identify the location but will not alert until you are at 1/2 mile from the location.