The new '06 ZO6 just made a 7 minute 40 second lap. Here is a small article that a German magazine wrote.
RECORD WAS NOT POSSIBLE
Just won the Le Mans GT!-Class, Jan Magnusson pushed the pedal at the Nürburgring. With the Corvette Z06 should the old record fallen - spicy advertisement for the new Sport-Corvette. But more than just(!) 7 minutes 40 seconds was not to archive. The Nordschleifen(northern track)-Record for not modified cars is still with the Donkervoort RS: 7.18.01!