That's not a bad way of looking at it sure but we cannot now exactly where Cabell's vehicle is in Altgens, if it's already commited to it's turn onto Elm but just out of shot, then the difference could be around a second but, 2-3s could work also.
Myers has been accused f cooking the books to make things fit and the speed at which vehicles turned that corner part of the problem, whether he gains or loses more than half a second by doing so I'm not sure. If it was easy to get all those sources to line up, his study would be a lot, lot shorter.