I could be wrong, but the ZR1 might not be done yet. If you read the article that run was done by one of the test engineers. When they did the run with the Z06 the brought in Jan Magnason one of the Team Corvette drivers to make a run. I wonder if they might do the same again. The engineer also mentions that there were section that he could have gone faster. Another thing to remember is that the ZR1 is doing this on a 220 treadware run flat tire, granted it is a Michelin PS2 but still not one of the real sticky R or Cup tires. I would love to see them make a run with a R tire.