Just picked up my S75D!!!! I would like to give some good news... I can confirm that my car was fitted with the new MCU. My VIN was 2473XX and went into production on 3/7. The speed is unparalleled. It reacts as fast as you can click. I played with the showroom floor that was outfitted with the old MCU and I felt like I could drive to my destination before the map would even load. All in all, very excited for the faster processor!