http://www.autoblog.com/2008/09/09/c...-gt2-programs/
In the last two years, the ALMS GT1 Corvettes have rarely had anyone in their own class to compete with. Because of the lack of success and cowardice of Ferarri, Porsche, Viper, and Saleen teams in GT1, Corvette has decided to move down to GT2 after one more shot at the GT1 title at the 24 Hours of LeMans.