Given that the info we have is that the CEO's interview involved a silly amount of questioning about college grades that were two decades old, I think that what anyone could tell is not that it's never going to come up again, but that it was way more important to that workplace than most others. You could reasonably be concerned that it would affect how you'd be viewed by the management, and affect your opportunities there.

Doubt. I looked at this post and all the other top level posts in this thread and cant reasonably assume any of these reindeer games would be predictive of anything on the job.