Of forgot that one. Yes he told us the cameras pick up the speed limit signs and display on drive dash. We were surprised and thought this was cool and we hadn't heard of it. Now that I have the car I know how wrong he was as I am get wrong speed limits often.
Well, it is an AP feature, one of the few the AP1 cars had at launch along with lane departure and auto high beams. It hasn't shown up on AP2+ firmware yet, but I'm sure it will at some point.