Sebring Testing

It appears that even though the Audi's are not factory backed, they are still the class of the field.

According to Crash.net:

For the second consecutive day, Emanuele Pirro was on top of the speed charts Tuesday as American Le Mans Series teams tested their cars for Saturday's season-opening Mobil 1 Twelve Hours of Sebring.
Pirro, the 2001 American Le Mans Series champion, drove the ADT Champion Audi R8 to a lap of 1m 49.819s, fastest of the 46 cars that recorded times during Tuesday's unofficial testing session.
Pirro will co-drive with Stefan Johansson and JJ Lehto in Saturday\'s race.
Frank Biela, driving the Infineon Team Joest Audi R8, was second-fastest on Tuesday with a lap of 1:49.824.

Unfortunately, Max Papis was not mentioned as recording a good time.