The best galvanization was in the 80s when the OEMs were scrambling in the "surprise, lead just got banned" era (lead acts like an anode, think of it like a lesser version of a high zinc primer).
That said, it's not the thick hot dip you see on I beams or on bolts at the hardware store and a modern car with modern coatings and attention to corrosion is still better.
Of the three continents that produce a lot of cars the Europeans still take corrosion more seriously than anyone else.
