In my program it was faculty, and chair and PD. Honestly, it's more about how it's handled. At some programs if you get under a certain cut off you may be put on a remedial program or study plan to improve your score. At some places it's friendly and encouraging - like at my residency - or at other places it can be a bit shameful, but most of the time it comes from the resident themselves just feeling bad at having done poorly.
Some faculty place emphasis on the score and will kind of be hard on you if you do poorly while others will be encouraging and say it's just a test and you can do better. There have been rare reports of some PD's parading the scores around or making them public and by deduction people eventually figure out who has which score. I think this attitude has fallen out of favor and is rare from what people tell me. Some programs aggressively prep their residents for OKAPs while at others it's a more independent study thing.
At my program residents with the highest OKAP score usually received an award and in the past were sometimes automatically slotted into the position of chief resident. Interestingly, highest OKAP score does not always equate with clinical acumen, patient care or sense of responsibility to co-residents.