It will be interesting to see if all the speed cameras that you are used to being picked up still are. I have one locally which my IS300h, running older software picked up. My new NX, running the current software, doesn't give the tell tale 'beep beep' although the camera is still there. I'm not inclined to test whether it's still active though
As I understand it, it only improves two things: "Route Guidance and Traffic Information Optimisations", although of course, it's possible they've fixed other things along the way. As far as I can see, it's not a Map Update, and doesn't change the map or the speed camera database. I've found if you have the SatNav Voice set to Mute / Volume 0, you no longer get the "beep beep" warning of speed cameras, so that might explain your lack of beeps even though visible on the screen.