I have the speed camera warnings turned off, period. So I wouldn't know if they ping in France or not.
From what I understand of it Garmin blocked (if that's the right word) the ability of all their modern GPS devices to hold or display a preset list of speed camera sites within the device itself. The devices may well ping up broad electronic 'Danger' areas, associated with cameras, just as map makers (like Michelin) can record the position of a speed camera on a sheet of paper.
I can confirm that the Nav V always shows the vehicle's current speed and the speed limit of the road alongside. This converts automatically in France into the equivalent miles per hour. For instance, the speed limit in most towns or villages is 50 KPH; the equivalent of 31 MPH. The device displays the speed as 31 (quite correctly) and the bike's current speed in mph beside it. Go over 31 MPH and the current speed turns red, a warning that you are exceeding the road's posted limit.
The map's database is pretty accurate. You can see the display change within a few yards of the road sign.
Does it know all the limits of all the roads? No, of course not. But it certainly knows most of them; one of the reasons the map sets are getting so large. It's not the roads themselves, it's the weight of data behind.