I was at the 'Ring all day on the 25th and I didn't see it running. They must have brought it out at lunch time.
Sound is horrible. I think my 135i with the Performance Exhaust sounds better. Certainly my M3 does.
2015 BMW M5 Sedan M-DCT w/Competition Pkg and Carbon Ceramic Brakes, Driver's Assistance, and Executive Pkgs, B&O, Alpine White / Sakhir Orange and Black Full Leather, lots of carbon fiber, and a Trunk Monkey call "Der Stig".