Audi R8 RWD? It's Possible

Is this mystery winged Audi R8 an RWD test mule? "Remember that mystery winged R8 running around Nurburgring run last week by Spyshots. nl? There's a theory by a usually knowledgeable user at RS6.com that suggests the car is a prototype of a potentially RWD R8 much like the latest Lamborghini Gallardo LP550-2."