The first time I was in A group with Panoz at Road Atlanta, David was there with his beast.
Yes they did let him run with us.
I have video of him blowing by me and two others on the back straight. This was the only time that I figured it was ok not to lift when someone was passing.
He was very patient out there, he caught me going into turn 1 once and followed me all the way to the next passing zone after turn 5. Damm it was hard keeping my eyes forward. You could hear his car from inside mine when he was behind me.
One day I will get my videos posted.