There is only one instance in which this could be true, and that is if Jurgen Weber turned up at the airport w/out confirmed res and wanted to travel F class, and there was no free seats in F or J class. (Not entirely unusual I'm sure). It would then not really matter who he is, because they will not bump a paying F pax just for the LH CEO (and why doesn't he take LH anyway?)

If that was not the case, I would find it very hard to believe the story. The top 10-15 execs of each Star Alliance airline carry a card called "STARID" which entitles them ( and their spouse if travelling together) to the highest class available on any Star flight at any time (for free!).

I'd say, it's a bit hard to believe too.