I also had a bad experience with him years ago at a time I was considering going back to academia, which contributed in my decision to stay in the industry. I don't think the details are important but yeah, he wasn't the nicest person on the table, made several comments that where really out of place, none of the professors around said anything but a couple just left the table in a way that made think that this was a common behaviour from him. It surprised me that such an important character in the PL community could say such things and walk out like nothing. I believe most people could easily get fired from a company nowadays if they made similar comments. Anyway, it's good to see he's taking some time to analyse how he interacts with other people.