At a Campagnolo seminar I attended in 1982, a Campy technician agressively asserted that all Campy headsets with dents in the races or cups got that way from overtightening by mechanics. Translation: they were getting tired of replacing headsets under warranty. Campy headsets were notorious for this problem at the time, much more so than the headsets found on cheaper bikes. At the time, I hypothesized that the problem arose more with Campy headsets because they were typically installed on racing bikes with steep headtube angles and short fork rakes, both of which would increase shock to the headset.

Now I know better. That Jobst Brandt article is fascinating.