If you are going to mention the Cadillac LMP, then why don't we bring in the Audi R8 it raced at Le Mans. I believe the Audi went 1-2-3 one year, and 1-2 the next. If my memory serves me correctly, didn't the Audi's beat the Cadillac by over 50 laps??? You can argue for days and days about which production car is better. It's the same as arguing religion, no one will ever agree, but look at those results. At a race, all under the same conditions, Audi dominated the field. Another thing, if Porsche was there, they probably would have handled the Audi's. Porsche holds the record for the most Le Mans victories as well as the longest streak of victories at about 8. I don't think anyone will ever agree that either American or European cars are better.