My CLPO (industry parlance, aka CLWP1for AFF) friend who is a about 1 year from LTWP says he almost always gets his seat request 1A/K. Except when his mate who is another CLPO is also travelling on the same flight. His mate got the prize at the recent QF WP1 function for the passenger with the most QF flights in the year. Something like 150 or so.To be fair, there may be a safety or security issue requiring a CL (VIP) to be seated in a particular seat. But I think most CLs not within that category would be horrified if they knew a simple seat request resulted in booting someone else out! It would be considered vulgar (I suspect most of them aren't told?)
I asked him about this scenario and he just shrugged his shoulders and said "No seat selection is guaranteed" and proceeded to tell me how one time he was booted from his seat selection by a certain Boy Band member who he says is not a true blue frequent flyer.