I saw this happening from a mile away. I think it's more ironic that Penske has been heralding the diesel as the future powerplant of automobiles - even though his Porsches have been handed their asses by the R-10. Hilarious!
The fact is anyone who follows motorsports now knows about Audi, its diesels and its direct injection. With a huge corporation such as that, racing is only a way to showcase the goods before they get to the public. And as the public becomes more aware, Audi sales potentially rise. The R-10 has proven its point, enough said.
Of course, ALMS is nothing but a subset of the U.S. in general, where at this date, American consumers can't even purchase diesels, let alone Audi diesels.